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Finding the Fourth Proportional to 390,875.95, 539,422.01 and 229,728.70

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Solution

The fourth proportional to 390,875.95, 539,422.01 and 229,728.70 is: 317,033.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,875.95 : 539,422.01 = 229,728.70 : x
  2. Step 2: Convert to fraction form
    390,875.95/539,422.01 = 229,728.70/x
  3. Step 3: Cross multiply
    390,875.95x = 539,422.01 × 229,728.70
  4. Step 4: Simplify right side
    390,875.95x = 123,920,717,108.69
  5. Step 5: Solve for x
    x = 123,920,717,108.69/390,875.95
  6. Step 6: Final answer
    x = 317,033.36

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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.