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Finding the Fourth Proportional to 402,631, 604,143.32 and 285,057.88

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Solution

The fourth proportional to 402,631, 604,143.32 and 285,057.88 is: 427,726.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,631 : 604,143.32 = 285,057.88 : x
  2. Step 2: Convert to fraction form
    402,631/604,143.32 = 285,057.88/x
  3. Step 3: Cross multiply
    402,631x = 604,143.32 × 285,057.88
  4. Step 4: Simplify right side
    402,631x = 172,215,814,015.36
  5. Step 5: Solve for x
    x = 172,215,814,015.36/402,631
  6. Step 6: Final answer
    x = 427,726.17

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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.