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Finding the Fourth Proportional to 1,387.08, 2,080.62 and 462.66

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Solution

The fourth proportional to 1,387.08, 2,080.62 and 462.66 is: 693.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.08 : 2,080.62 = 462.66 : x
  2. Step 2: Convert to fraction form
    1,387.08/2,080.62 = 462.66/x
  3. Step 3: Cross multiply
    1,387.08x = 2,080.62 × 462.66
  4. Step 4: Simplify right side
    1,387.08x = 962,619.65
  5. Step 5: Solve for x
    x = 962,619.65/1,387.08
  6. Step 6: Final answer
    x = 693.99

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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.