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Finding the Fourth Proportional to 437,538.60, 656,307.90 and 288,239.40

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Solution

The fourth proportional to 437,538.60, 656,307.90 and 288,239.40 is: 432,359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,538.60 : 656,307.90 = 288,239.40 : x
  2. Step 2: Convert to fraction form
    437,538.60/656,307.90 = 288,239.40/x
  3. Step 3: Cross multiply
    437,538.60x = 656,307.90 × 288,239.40
  4. Step 4: Simplify right side
    437,538.60x = 189,173,795,311.26
  5. Step 5: Solve for x
    x = 189,173,795,311.26/437,538.60
  6. Step 6: Final answer
    x = 432,359.10

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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.