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Finding the Fourth Proportional to 392,617.32, 589,044.21 and 139,864.82

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Solution

The fourth proportional to 392,617.32, 589,044.21 and 139,864.82 is: 209,839.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,617.32 : 589,044.21 = 139,864.82 : x
  2. Step 2: Convert to fraction form
    392,617.32/589,044.21 = 139,864.82/x
  3. Step 3: Cross multiply
    392,617.32x = 589,044.21 × 139,864.82
  4. Step 4: Simplify right side
    392,617.32x = 82,386,559,458.47
  5. Step 5: Solve for x
    x = 82,386,559,458.47/392,617.32
  6. Step 6: Final answer
    x = 209,839.34

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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.