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Finding the Fourth Proportional to 389,717.60, 584,454.90 and 153,132.80

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Solution

The fourth proportional to 389,717.60, 584,454.90 and 153,132.80 is: 229,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,717.60 : 584,454.90 = 153,132.80 : x
  2. Step 2: Convert to fraction form
    389,717.60/584,454.90 = 153,132.80/x
  3. Step 3: Cross multiply
    389,717.60x = 584,454.90 × 153,132.80
  4. Step 4: Simplify right side
    389,717.60x = 89,499,215,310.72
  5. Step 5: Solve for x
    x = 89,499,215,310.72/389,717.60
  6. Step 6: Final answer
    x = 229,651.46

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1.5x scale

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.