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Finding the Fourth Proportional to 437,627.40, 656,441.10 and 390,625.80

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Solution

The fourth proportional to 437,627.40, 656,441.10 and 390,625.80 is: 585,938.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,627.40 : 656,441.10 = 390,625.80 : x
  2. Step 2: Convert to fraction form
    437,627.40/656,441.10 = 390,625.80/x
  3. Step 3: Cross multiply
    437,627.40x = 656,441.10 × 390,625.80
  4. Step 4: Simplify right side
    437,627.40x = 256,422,829,840.38
  5. Step 5: Solve for x
    x = 256,422,829,840.38/437,627.40
  6. Step 6: Final answer
    x = 585,938.70

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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.