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Finding the Fourth Proportional to 658,049.40, 987,074.10 and 653,902.20

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Solution

The fourth proportional to 658,049.40, 987,074.10 and 653,902.20 is: 980,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,049.40 : 987,074.10 = 653,902.20 : x
  2. Step 2: Convert to fraction form
    658,049.40/987,074.10 = 653,902.20/x
  3. Step 3: Cross multiply
    658,049.40x = 987,074.10 × 653,902.20
  4. Step 4: Simplify right side
    658,049.40x = 645,449,925,553.02
  5. Step 5: Solve for x
    x = 645,449,925,553.02/658,049.40
  6. Step 6: Final answer
    x = 980,853.30

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Half scale
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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.