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Finding the Fourth Proportional to 651,207.20, 976,810.80 and 438,630.80

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Solution

The fourth proportional to 651,207.20, 976,810.80 and 438,630.80 is: 657,946.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,207.20 : 976,810.80 = 438,630.80 : x
  2. Step 2: Convert to fraction form
    651,207.20/976,810.80 = 438,630.80/x
  3. Step 3: Cross multiply
    651,207.20x = 976,810.80 × 438,630.80
  4. Step 4: Simplify right side
    651,207.20x = 428,459,302,652.64
  5. Step 5: Solve for x
    x = 428,459,302,652.64/651,207.20
  6. Step 6: Final answer
    x = 657,946.20

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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.