Home / 389,780.20-584,670.30-140,429.80

Finding the Fourth Proportional to 389,780.20, 584,670.30 and 140,429.80

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Solution

The fourth proportional to 389,780.20, 584,670.30 and 140,429.80 is: 210,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,780.20 : 584,670.30 = 140,429.80 : x
  2. Step 2: Convert to fraction form
    389,780.20/584,670.30 = 140,429.80/x
  3. Step 3: Cross multiply
    389,780.20x = 584,670.30 × 140,429.80
  4. Step 4: Simplify right side
    389,780.20x = 82,105,133,294.94
  5. Step 5: Solve for x
    x = 82,105,133,294.94/389,780.20
  6. Step 6: Final answer
    x = 210,644.70

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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.