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Finding the Fourth Proportional to 391,570.60, 587,355.90 and 192,280.23

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Solution

The fourth proportional to 391,570.60, 587,355.90 and 192,280.23 is: 288,420.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.60 : 587,355.90 = 192,280.23 : x
  2. Step 2: Convert to fraction form
    391,570.60/587,355.90 = 192,280.23/x
  3. Step 3: Cross multiply
    391,570.60x = 587,355.90 × 192,280.23
  4. Step 4: Simplify right side
    391,570.60x = 112,936,927,543.86
  5. Step 5: Solve for x
    x = 112,936,927,543.86/391,570.60
  6. Step 6: Final answer
    x = 288,420.35

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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.