Home / 811,454.72-1,215,082.56-721,178.24

Finding the Fourth Proportional to 811,454.72, 1,215,082.56 and 721,178.24

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Solution

The fourth proportional to 811,454.72, 1,215,082.56 and 721,178.24 is: 1,079,901.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,454.72 : 1,215,082.56 = 721,178.24 : x
  2. Step 2: Convert to fraction form
    811,454.72/1,215,082.56 = 721,178.24/x
  3. Step 3: Cross multiply
    811,454.72x = 1,215,082.56 × 721,178.24
  4. Step 4: Simplify right side
    811,454.72x = 876,291,102,075.49
  5. Step 5: Solve for x
    x = 876,291,102,075.49/811,454.72
  6. Step 6: Final answer
    x = 1,079,901.42

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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.