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Finding the Fourth Proportional to 391,382.52, 540,110.04 and 221,649.72

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Solution

The fourth proportional to 391,382.52, 540,110.04 and 221,649.72 is: 305,877.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,382.52 : 540,110.04 = 221,649.72 : x
  2. Step 2: Convert to fraction form
    391,382.52/540,110.04 = 221,649.72/x
  3. Step 3: Cross multiply
    391,382.52x = 540,110.04 × 221,649.72
  4. Step 4: Simplify right side
    391,382.52x = 119,715,239,135.19
  5. Step 5: Solve for x
    x = 119,715,239,135.19/391,382.52
  6. Step 6: Final answer
    x = 305,877.84

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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.