Home / 1,387.25-1,911.14-966.83

Finding the Fourth Proportional to 1,387.25, 1,911.14 and 966.83

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Solution

The fourth proportional to 1,387.25, 1,911.14 and 966.83 is: 1,331.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.25 : 1,911.14 = 966.83 : x
  2. Step 2: Convert to fraction form
    1,387.25/1,911.14 = 966.83/x
  3. Step 3: Cross multiply
    1,387.25x = 1,911.14 × 966.83
  4. Step 4: Simplify right side
    1,387.25x = 1,847,752.26
  5. Step 5: Solve for x
    x = 1,847,752.26/1,387.25
  6. Step 6: Final answer
    x = 1,331.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.