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Finding the Fourth Proportional to 390,933, 586,432.44 and 124,731.36

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Solution

The fourth proportional to 390,933, 586,432.44 and 124,731.36 is: 187,107.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,933 : 586,432.44 = 124,731.36 : x
  2. Step 2: Convert to fraction form
    390,933/586,432.44 = 124,731.36/x
  3. Step 3: Cross multiply
    390,933x = 586,432.44 × 124,731.36
  4. Step 4: Simplify right side
    390,933x = 73,146,515,789.32
  5. Step 5: Solve for x
    x = 73,146,515,789.32/390,933
  6. Step 6: Final answer
    x = 187,107.55

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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.