Home / 1,301.20-1,951.80-716.78

Finding the Fourth Proportional to 1,301.20, 1,951.80 and 716.78

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Solution

The fourth proportional to 1,301.20, 1,951.80 and 716.78 is: 1,075.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.20 : 1,951.80 = 716.78 : x
  2. Step 2: Convert to fraction form
    1,301.20/1,951.80 = 716.78/x
  3. Step 3: Cross multiply
    1,301.20x = 1,951.80 × 716.78
  4. Step 4: Simplify right side
    1,301.20x = 1,399,011.20
  5. Step 5: Solve for x
    x = 1,399,011.20/1,301.20
  6. Step 6: Final answer
    x = 1,075.17

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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.