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Finding the Fourth Proportional to 408,987, 613,480.56 and 187,371

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Solution

The fourth proportional to 408,987, 613,480.56 and 187,371 is: 281,056.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,987 : 613,480.56 = 187,371 : x
  2. Step 2: Convert to fraction form
    408,987/613,480.56 = 187,371/x
  3. Step 3: Cross multiply
    408,987x = 613,480.56 × 187,371
  4. Step 4: Simplify right side
    408,987x = 114,948,466,007.76
  5. Step 5: Solve for x
    x = 114,948,466,007.76/408,987
  6. Step 6: Final answer
    x = 281,056.53

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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.