Home / 1,164.20-1,605.49-928.91

Finding the Fourth Proportional to 1,164.20, 1,605.49 and 928.91

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Solution

The fourth proportional to 1,164.20, 1,605.49 and 928.91 is: 1,281.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.20 : 1,605.49 = 928.91 : x
  2. Step 2: Convert to fraction form
    1,164.20/1,605.49 = 928.91/x
  3. Step 3: Cross multiply
    1,164.20x = 1,605.49 × 928.91
  4. Step 4: Simplify right side
    1,164.20x = 1,491,357.41
  5. Step 5: Solve for x
    x = 1,491,357.41/1,164.20
  6. Step 6: Final answer
    x = 1,281.02

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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.