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Finding the Fourth Proportional to 392,430.65, 541,388.68 and 246,978.55

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Solution

The fourth proportional to 392,430.65, 541,388.68 and 246,978.55 is: 340,726.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,430.65 : 541,388.68 = 246,978.55 : x
  2. Step 2: Convert to fraction form
    392,430.65/541,388.68 = 246,978.55/x
  3. Step 3: Cross multiply
    392,430.65x = 541,388.68 × 246,978.55
  4. Step 4: Simplify right side
    392,430.65x = 133,711,391,172.81
  5. Step 5: Solve for x
    x = 133,711,391,172.81/392,430.65
  6. Step 6: Final answer
    x = 340,726.17

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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.