Home / 869,385.80-1,304,078.70-550,521.20

Finding the Fourth Proportional to 869,385.80, 1,304,078.70 and 550,521.20

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Solution

The fourth proportional to 869,385.80, 1,304,078.70 and 550,521.20 is: 825,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,385.80 : 1,304,078.70 = 550,521.20 : x
  2. Step 2: Convert to fraction form
    869,385.80/1,304,078.70 = 550,521.20/x
  3. Step 3: Cross multiply
    869,385.80x = 1,304,078.70 × 550,521.20
  4. Step 4: Simplify right side
    869,385.80x = 717,922,970,818.44
  5. Step 5: Solve for x
    x = 717,922,970,818.44/869,385.80
  6. Step 6: Final answer
    x = 825,781.80

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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.