Home / 1,385.13-2,077.79-460.65

Finding the Fourth Proportional to 1,385.13, 2,077.79 and 460.65

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Solution

The fourth proportional to 1,385.13, 2,077.79 and 460.65 is: 691.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.13 : 2,077.79 = 460.65 : x
  2. Step 2: Convert to fraction form
    1,385.13/2,077.79 = 460.65/x
  3. Step 3: Cross multiply
    1,385.13x = 2,077.79 × 460.65
  4. Step 4: Simplify right side
    1,385.13x = 957,131.66
  5. Step 5: Solve for x
    x = 957,131.66/1,385.13
  6. Step 6: Final answer
    x = 691.00

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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.