Home / 437,629.40-656,444.10-390,627.80

Finding the Fourth Proportional to 437,629.40, 656,444.10 and 390,627.80

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Solution

The fourth proportional to 437,629.40, 656,444.10 and 390,627.80 is: 585,941.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,629.40 : 656,444.10 = 390,627.80 : x
  2. Step 2: Convert to fraction form
    437,629.40/656,444.10 = 390,627.80/x
  3. Step 3: Cross multiply
    437,629.40x = 656,444.10 × 390,627.80
  4. Step 4: Simplify right side
    437,629.40x = 256,425,314,605.98
  5. Step 5: Solve for x
    x = 256,425,314,605.98/437,629.40
  6. Step 6: Final answer
    x = 585,941.70

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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.