Home / 827,136.20-1,238,630.70-661,248.20

Finding the Fourth Proportional to 827,136.20, 1,238,630.70 and 661,248.20

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Solution

The fourth proportional to 827,136.20, 1,238,630.70 and 661,248.20 is: 990,214.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,136.20 : 1,238,630.70 = 661,248.20 : x
  2. Step 2: Convert to fraction form
    827,136.20/1,238,630.70 = 661,248.20/x
  3. Step 3: Cross multiply
    827,136.20x = 1,238,630.70 × 661,248.20
  4. Step 4: Simplify right side
    827,136.20x = 819,042,320,839.74
  5. Step 5: Solve for x
    x = 819,042,320,839.74/827,136.20
  6. Step 6: Final answer
    x = 990,214.58

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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.