Home / 1,387.30-2,081.21-462.77

Finding the Fourth Proportional to 1,387.30, 2,081.21 and 462.77

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Solution

The fourth proportional to 1,387.30, 2,081.21 and 462.77 is: 694.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.30 : 2,081.21 = 462.77 : x
  2. Step 2: Convert to fraction form
    1,387.30/2,081.21 = 462.77/x
  3. Step 3: Cross multiply
    1,387.30x = 2,081.21 × 462.77
  4. Step 4: Simplify right side
    1,387.30x = 963,121.55
  5. Step 5: Solve for x
    x = 963,121.55/1,387.30
  6. Step 6: Final answer
    x = 694.24

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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.