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Finding the Fourth Proportional to 389,733.20, 584,599.80 and 254,430.80

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Solution

The fourth proportional to 389,733.20, 584,599.80 and 254,430.80 is: 381,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,733.20 : 584,599.80 = 254,430.80 : x
  2. Step 2: Convert to fraction form
    389,733.20/584,599.80 = 254,430.80/x
  3. Step 3: Cross multiply
    389,733.20x = 584,599.80 × 254,430.80
  4. Step 4: Simplify right side
    389,733.20x = 148,740,194,793.84
  5. Step 5: Solve for x
    x = 148,740,194,793.84/389,733.20
  6. Step 6: Final answer
    x = 381,646.20

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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.