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Finding the Fourth Proportional to 390,754.35, 539,244.81 and 229,612.95

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Solution

The fourth proportional to 390,754.35, 539,244.81 and 229,612.95 is: 316,868.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,754.35 : 539,244.81 = 229,612.95 : x
  2. Step 2: Convert to fraction form
    390,754.35/539,244.81 = 229,612.95/x
  3. Step 3: Cross multiply
    390,754.35x = 539,244.81 × 229,612.95
  4. Step 4: Simplify right side
    390,754.35x = 123,817,591,596.29
  5. Step 5: Solve for x
    x = 123,817,591,596.29/390,754.35
  6. Step 6: Final answer
    x = 316,868.11

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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.