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Finding the Fourth Proportional to 521,992.46, 720,400.16 and 292,588.72

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Solution

The fourth proportional to 521,992.46, 720,400.16 and 292,588.72 is: 403,800.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,992.46 : 720,400.16 = 292,588.72 : x
  2. Step 2: Convert to fraction form
    521,992.46/720,400.16 = 292,588.72/x
  3. Step 3: Cross multiply
    521,992.46x = 720,400.16 × 292,588.72
  4. Step 4: Simplify right side
    521,992.46x = 210,780,960,702.20
  5. Step 5: Solve for x
    x = 210,780,960,702.20/521,992.46
  6. Step 6: Final answer
    x = 403,800.78

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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.