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Finding the Fourth Proportional to 391,602.20, 587,403.30 and 371,384.60

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Solution

The fourth proportional to 391,602.20, 587,403.30 and 371,384.60 is: 557,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,602.20 : 587,403.30 = 371,384.60 : x
  2. Step 2: Convert to fraction form
    391,602.20/587,403.30 = 371,384.60/x
  3. Step 3: Cross multiply
    391,602.20x = 587,403.30 × 371,384.60
  4. Step 4: Simplify right side
    391,602.20x = 218,152,539,609.18
  5. Step 5: Solve for x
    x = 218,152,539,609.18/391,602.20
  6. Step 6: Final answer
    x = 557,076.90

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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.