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Finding the Fourth Proportional to 409,992.47, 614,992.84 and 143,759.40

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Solution

The fourth proportional to 409,992.47, 614,992.84 and 143,759.40 is: 215,640.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,992.47 : 614,992.84 = 143,759.40 : x
  2. Step 2: Convert to fraction form
    409,992.47/614,992.84 = 143,759.40/x
  3. Step 3: Cross multiply
    409,992.47x = 614,992.84 × 143,759.40
  4. Step 4: Simplify right side
    409,992.47x = 88,411,001,682.70
  5. Step 5: Solve for x
    x = 88,411,001,682.70/409,992.47
  6. Step 6: Final answer
    x = 215,640.55

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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.