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Finding the Fourth Proportional to 392,526.20, 585,770.59 and 390,280.88

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Solution

The fourth proportional to 392,526.20, 585,770.59 and 390,280.88 is: 582,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,526.20 : 585,770.59 = 390,280.88 : x
  2. Step 2: Convert to fraction form
    392,526.20/585,770.59 = 390,280.88/x
  3. Step 3: Cross multiply
    392,526.20x = 585,770.59 × 390,280.88
  4. Step 4: Simplify right side
    392,526.20x = 228,615,061,343.32
  5. Step 5: Solve for x
    x = 228,615,061,343.32/392,526.20
  6. Step 6: Final answer
    x = 582,419.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.