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Finding the Fourth Proportional to 581,518.76, 871,387.84 and 391,274.48

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Solution

The fourth proportional to 581,518.76, 871,387.84 and 391,274.48 is: 586,312.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,518.76 : 871,387.84 = 391,274.48 : x
  2. Step 2: Convert to fraction form
    581,518.76/871,387.84 = 391,274.48/x
  3. Step 3: Cross multiply
    581,518.76x = 871,387.84 × 391,274.48
  4. Step 4: Simplify right side
    581,518.76x = 340,951,823,974.32
  5. Step 5: Solve for x
    x = 340,951,823,974.32/581,518.76
  6. Step 6: Final answer
    x = 586,312.68

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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.