Home / 811,851.80-1,218,123.30-512,562.20

Finding the Fourth Proportional to 811,851.80, 1,218,123.30 and 512,562.20

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Solution

The fourth proportional to 811,851.80, 1,218,123.30 and 512,562.20 is: 769,061.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,851.80 : 1,218,123.30 = 512,562.20 : x
  2. Step 2: Convert to fraction form
    811,851.80/1,218,123.30 = 512,562.20/x
  3. Step 3: Cross multiply
    811,851.80x = 1,218,123.30 × 512,562.20
  4. Step 4: Simplify right side
    811,851.80x = 624,363,958,519.26
  5. Step 5: Solve for x
    x = 624,363,958,519.26/811,851.80
  6. Step 6: Final answer
    x = 769,061.49

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Double scale
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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.