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Finding the Fourth Proportional to 445,381.32, 668,018.52 and 125,557.28

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Solution

The fourth proportional to 445,381.32, 668,018.52 and 125,557.28 is: 188,320.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,381.32 : 668,018.52 = 125,557.28 : x
  2. Step 2: Convert to fraction form
    445,381.32/668,018.52 = 125,557.28/x
  3. Step 3: Cross multiply
    445,381.32x = 668,018.52 × 125,557.28
  4. Step 4: Simplify right side
    445,381.32x = 83,874,588,360.83
  5. Step 5: Solve for x
    x = 83,874,588,360.83/445,381.32
  6. Step 6: Final answer
    x = 188,320.85

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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.