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Finding the Fourth Proportional to 827,407.80, 1,241,111.70 and 512,479.80

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Solution

The fourth proportional to 827,407.80, 1,241,111.70 and 512,479.80 is: 768,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,407.80 : 1,241,111.70 = 512,479.80 : x
  2. Step 2: Convert to fraction form
    827,407.80/1,241,111.70 = 512,479.80/x
  3. Step 3: Cross multiply
    827,407.80x = 1,241,111.70 × 512,479.80
  4. Step 4: Simplify right side
    827,407.80x = 636,044,675,793.66
  5. Step 5: Solve for x
    x = 636,044,675,793.66/827,407.80
  6. Step 6: Final answer
    x = 768,719.70

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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.