Home / 818,721.70-1,228,082.55-257,756.20

Finding the Fourth Proportional to 818,721.70, 1,228,082.55 and 257,756.20

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Solution

The fourth proportional to 818,721.70, 1,228,082.55 and 257,756.20 is: 386,634.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,721.70 : 1,228,082.55 = 257,756.20 : x
  2. Step 2: Convert to fraction form
    818,721.70/1,228,082.55 = 257,756.20/x
  3. Step 3: Cross multiply
    818,721.70x = 1,228,082.55 × 257,756.20
  4. Step 4: Simplify right side
    818,721.70x = 316,545,891,374.31
  5. Step 5: Solve for x
    x = 316,545,891,374.31/818,721.70
  6. Step 6: Final answer
    x = 386,634.30

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Half scale
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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.