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Finding the Fourth Proportional to 617,125.76, 851,390.08 and 387,548

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Solution

The fourth proportional to 617,125.76, 851,390.08 and 387,548 is: 534,663.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,125.76 : 851,390.08 = 387,548 : x
  2. Step 2: Convert to fraction form
    617,125.76/851,390.08 = 387,548/x
  3. Step 3: Cross multiply
    617,125.76x = 851,390.08 × 387,548
  4. Step 4: Simplify right side
    617,125.76x = 329,954,522,723.84
  5. Step 5: Solve for x
    x = 329,954,522,723.84/617,125.76
  6. Step 6: Final answer
    x = 534,663.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.