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Finding the Fourth Proportional to 521,740.80, 781,444.80 and 510,076.80

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Solution

The fourth proportional to 521,740.80, 781,444.80 and 510,076.80 is: 763,974.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,740.80 : 781,444.80 = 510,076.80 : x
  2. Step 2: Convert to fraction form
    521,740.80/781,444.80 = 510,076.80/x
  3. Step 3: Cross multiply
    521,740.80x = 781,444.80 × 510,076.80
  4. Step 4: Simplify right side
    521,740.80x = 398,596,862,960.64
  5. Step 5: Solve for x
    x = 398,596,862,960.64/521,740.80
  6. Step 6: Final answer
    x = 763,974.88

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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.