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Finding the Fourth Proportional to 576,128.93, 864,304.62 and 221,115.27

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Solution

The fourth proportional to 576,128.93, 864,304.62 and 221,115.27 is: 331,715.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,128.93 : 864,304.62 = 221,115.27 : x
  2. Step 2: Convert to fraction form
    576,128.93/864,304.62 = 221,115.27/x
  3. Step 3: Cross multiply
    576,128.93x = 864,304.62 × 221,115.27
  4. Step 4: Simplify right side
    576,128.93x = 191,110,948,052.10
  5. Step 5: Solve for x
    x = 191,110,948,052.10/576,128.93
  6. Step 6: Final answer
    x = 331,715.59

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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.