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Finding the Fourth Proportional to 651,648,654.40, 977,472,981.60 and 361,411,009.60

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Solution

The fourth proportional to 651,648,654.40, 977,472,981.60 and 361,411,009.60 is: 542,116,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,648,654.40 : 977,472,981.60 = 361,411,009.60 : x
  2. Step 2: Convert to fraction form
    651,648,654.40/977,472,981.60 = 361,411,009.60/x
  3. Step 3: Cross multiply
    651,648,654.40x = 977,472,981.60 × 361,411,009.60
  4. Step 4: Simplify right side
    651,648,654.40x = 353,269,497,136,778,240
  5. Step 5: Solve for x
    x = 353,269,497,136,778,240/651,648,654.40
  6. Step 6: Final answer
    x = 542,116,514.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.