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Finding the Fourth Proportional to 390,869.52, 586,390.38 and 222,469.14

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Solution

The fourth proportional to 390,869.52, 586,390.38 and 222,469.14 is: 333,752.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,869.52 : 586,390.38 = 222,469.14 : x
  2. Step 2: Convert to fraction form
    390,869.52/586,390.38 = 222,469.14/x
  3. Step 3: Cross multiply
    390,869.52x = 586,390.38 × 222,469.14
  4. Step 4: Simplify right side
    390,869.52x = 130,453,763,542.87
  5. Step 5: Solve for x
    x = 130,453,763,542.87/390,869.52
  6. Step 6: Final answer
    x = 333,752.72

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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.