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Finding the Fourth Proportional to 417,856.40, 626,885.40 and 137,358.80

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Solution

The fourth proportional to 417,856.40, 626,885.40 and 137,358.80 is: 206,071.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,856.40 : 626,885.40 = 137,358.80 : x
  2. Step 2: Convert to fraction form
    417,856.40/626,885.40 = 137,358.80/x
  3. Step 3: Cross multiply
    417,856.40x = 626,885.40 × 137,358.80
  4. Step 4: Simplify right side
    417,856.40x = 86,108,226,281.52
  5. Step 5: Solve for x
    x = 86,108,226,281.52/417,856.40
  6. Step 6: Final answer
    x = 206,071.34

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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.