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Finding the Fourth Proportional to 437,508.80, 656,522.40 and 318,881.60

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Solution

The fourth proportional to 437,508.80, 656,522.40 and 318,881.60 is: 478,511.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,508.80 : 656,522.40 = 318,881.60 : x
  2. Step 2: Convert to fraction form
    437,508.80/656,522.40 = 318,881.60/x
  3. Step 3: Cross multiply
    437,508.80x = 656,522.40 × 318,881.60
  4. Step 4: Simplify right side
    437,508.80x = 209,352,913,347.84
  5. Step 5: Solve for x
    x = 209,352,913,347.84/437,508.80
  6. Step 6: Final answer
    x = 478,511.32

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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.