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Finding the Fourth Proportional to 389,400.80, 584,101.20 and 165,014.60

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Solution

The fourth proportional to 389,400.80, 584,101.20 and 165,014.60 is: 247,521.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,400.80 : 584,101.20 = 165,014.60 : x
  2. Step 2: Convert to fraction form
    389,400.80/584,101.20 = 165,014.60/x
  3. Step 3: Cross multiply
    389,400.80x = 584,101.20 × 165,014.60
  4. Step 4: Simplify right side
    389,400.80x = 96,385,225,877.52
  5. Step 5: Solve for x
    x = 96,385,225,877.52/389,400.80
  6. Step 6: Final answer
    x = 247,521.90

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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.