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Finding the Fourth Proportional to 437,627.20, 656,586.60 and 390,593.20

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Solution

The fourth proportional to 437,627.20, 656,586.60 and 390,593.20 is: 586,019.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,627.20 : 656,586.60 = 390,593.20 : x
  2. Step 2: Convert to fraction form
    437,627.20/656,586.60 = 390,593.20/x
  3. Step 3: Cross multiply
    437,627.20x = 656,586.60 × 390,593.20
  4. Step 4: Simplify right side
    437,627.20x = 256,458,261,171.12
  5. Step 5: Solve for x
    x = 256,458,261,171.12/437,627.20
  6. Step 6: Final answer
    x = 586,019.93

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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.