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Finding the Fourth Proportional to 371,987.64, 557,653.82 and 147,505.86

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Solution

The fourth proportional to 371,987.64, 557,653.82 and 147,505.86 is: 221,128.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,987.64 : 557,653.82 = 147,505.86 : x
  2. Step 2: Convert to fraction form
    371,987.64/557,653.82 = 147,505.86/x
  3. Step 3: Cross multiply
    371,987.64x = 557,653.82 × 147,505.86
  4. Step 4: Simplify right side
    371,987.64x = 82,257,205,563.86
  5. Step 5: Solve for x
    x = 82,257,205,563.86/371,987.64
  6. Step 6: Final answer
    x = 221,128.87

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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.