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Finding the Fourth Proportional to 426,881.76, 640,358.88 and 127,343.04

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Solution

The fourth proportional to 426,881.76, 640,358.88 and 127,343.04 is: 191,025.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,881.76 : 640,358.88 = 127,343.04 : x
  2. Step 2: Convert to fraction form
    426,881.76/640,358.88 = 127,343.04/x
  3. Step 3: Cross multiply
    426,881.76x = 640,358.88 × 127,343.04
  4. Step 4: Simplify right side
    426,881.76x = 81,545,246,470.20
  5. Step 5: Solve for x
    x = 81,545,246,470.20/426,881.76
  6. Step 6: Final answer
    x = 191,025.37

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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.