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Finding the Fourth Proportional to 389,444.70, 584,123.85 and 108,990.30

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Solution

The fourth proportional to 389,444.70, 584,123.85 and 108,990.30 is: 163,473.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,444.70 : 584,123.85 = 108,990.30 : x
  2. Step 2: Convert to fraction form
    389,444.70/584,123.85 = 108,990.30/x
  3. Step 3: Cross multiply
    389,444.70x = 584,123.85 × 108,990.30
  4. Step 4: Simplify right side
    389,444.70x = 63,663,833,648.66
  5. Step 5: Solve for x
    x = 63,663,833,648.66/389,444.70
  6. Step 6: Final answer
    x = 163,473.36

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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.