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Finding the Fourth Proportional to 658,404.60, 987,606.90 and 651,406.20

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Solution

The fourth proportional to 658,404.60, 987,606.90 and 651,406.20 is: 977,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,404.60 : 987,606.90 = 651,406.20 : x
  2. Step 2: Convert to fraction form
    658,404.60/987,606.90 = 651,406.20/x
  3. Step 3: Cross multiply
    658,404.60x = 987,606.90 × 651,406.20
  4. Step 4: Simplify right side
    658,404.60x = 643,333,257,822.78
  5. Step 5: Solve for x
    x = 643,333,257,822.78/658,404.60
  6. Step 6: Final answer
    x = 977,109.30

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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.