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Finding the Fourth Proportional to 604,838.20, 907,257.30 and 427,691.20

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Solution

The fourth proportional to 604,838.20, 907,257.30 and 427,691.20 is: 641,536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,838.20 : 907,257.30 = 427,691.20 : x
  2. Step 2: Convert to fraction form
    604,838.20/907,257.30 = 427,691.20/x
  3. Step 3: Cross multiply
    604,838.20x = 907,257.30 × 427,691.20
  4. Step 4: Simplify right side
    604,838.20x = 388,025,963,345.76
  5. Step 5: Solve for x
    x = 388,025,963,345.76/604,838.20
  6. Step 6: Final answer
    x = 641,536.80

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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.