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Finding the Fourth Proportional to 380,871.48, 571,381.95 and 140,987.48

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Solution

The fourth proportional to 380,871.48, 571,381.95 and 140,987.48 is: 211,508.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,871.48 : 571,381.95 = 140,987.48 : x
  2. Step 2: Convert to fraction form
    380,871.48/571,381.95 = 140,987.48/x
  3. Step 3: Cross multiply
    380,871.48x = 571,381.95 × 140,987.48
  4. Step 4: Simplify right side
    380,871.48x = 80,557,701,247.99
  5. Step 5: Solve for x
    x = 80,557,701,247.99/380,871.48
  6. Step 6: Final answer
    x = 211,508.88

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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.