Home / 782,520.32-1,173,780.48-427,340.59

Finding the Fourth Proportional to 782,520.32, 1,173,780.48 and 427,340.59

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Solution

The fourth proportional to 782,520.32, 1,173,780.48 and 427,340.59 is: 641,010.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,520.32 : 1,173,780.48 = 427,340.59 : x
  2. Step 2: Convert to fraction form
    782,520.32/1,173,780.48 = 427,340.59/x
  3. Step 3: Cross multiply
    782,520.32x = 1,173,780.48 × 427,340.59
  4. Step 4: Simplify right side
    782,520.32x = 501,604,042,853.68
  5. Step 5: Solve for x
    x = 501,604,042,853.68/782,520.32
  6. Step 6: Final answer
    x = 641,010.89

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Double scale
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Similar ratio
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1.5x scale

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.