Home / 1,385.13-2,077.70-359.13

Finding the Fourth Proportional to 1,385.13, 2,077.70 and 359.13

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Solution

The fourth proportional to 1,385.13, 2,077.70 and 359.13 is: 538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.13 : 2,077.70 = 359.13 : x
  2. Step 2: Convert to fraction form
    1,385.13/2,077.70 = 359.13/x
  3. Step 3: Cross multiply
    1,385.13x = 2,077.70 × 359.13
  4. Step 4: Simplify right side
    1,385.13x = 746,164.40
  5. Step 5: Solve for x
    x = 746,164.40/1,385.13
  6. Step 6: Final answer
    x = 538.70

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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.