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Finding the Fourth Proportional to 417,627.18, 626,508.62 and 129,371.51

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Solution

The fourth proportional to 417,627.18, 626,508.62 and 129,371.51 is: 194,078.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,627.18 : 626,508.62 = 129,371.51 : x
  2. Step 2: Convert to fraction form
    417,627.18/626,508.62 = 129,371.51/x
  3. Step 3: Cross multiply
    417,627.18x = 626,508.62 × 129,371.51
  4. Step 4: Simplify right side
    417,627.18x = 81,052,362,418.02
  5. Step 5: Solve for x
    x = 81,052,362,418.02/417,627.18
  6. Step 6: Final answer
    x = 194,078.27

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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.