Home / 386,247.20-579,428.40-136,909.60

Finding the Fourth Proportional to 386,247.20, 579,428.40 and 136,909.60

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Solution

The fourth proportional to 386,247.20, 579,428.40 and 136,909.60 is: 205,384.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,247.20 : 579,428.40 = 136,909.60 : x
  2. Step 2: Convert to fraction form
    386,247.20/579,428.40 = 136,909.60/x
  3. Step 3: Cross multiply
    386,247.20x = 579,428.40 × 136,909.60
  4. Step 4: Simplify right side
    386,247.20x = 79,329,310,472.64
  5. Step 5: Solve for x
    x = 79,329,310,472.64/386,247.20
  6. Step 6: Final answer
    x = 205,384.82

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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.