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Finding the Fourth Proportional to 651,306.60, 976,959.90 and 438,730.20

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Solution

The fourth proportional to 651,306.60, 976,959.90 and 438,730.20 is: 658,095.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,306.60 : 976,959.90 = 438,730.20 : x
  2. Step 2: Convert to fraction form
    651,306.60/976,959.90 = 438,730.20/x
  3. Step 3: Cross multiply
    651,306.60x = 976,959.90 × 438,730.20
  4. Step 4: Simplify right side
    651,306.60x = 428,621,812,318.98
  5. Step 5: Solve for x
    x = 428,621,812,318.98/651,306.60
  6. Step 6: Final answer
    x = 658,095.30

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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.