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Finding the Fourth Proportional to 1,386.76, 2,079.91 and 462.14

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Solution

The fourth proportional to 1,386.76, 2,079.91 and 462.14 is: 693.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.76 : 2,079.91 = 462.14 : x
  2. Step 2: Convert to fraction form
    1,386.76/2,079.91 = 462.14/x
  3. Step 3: Cross multiply
    1,386.76x = 2,079.91 × 462.14
  4. Step 4: Simplify right side
    1,386.76x = 961,209.61
  5. Step 5: Solve for x
    x = 961,209.61/1,386.76
  6. Step 6: Final answer
    x = 693.13

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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.