Home / 1,278.04-1,763.61-718.50

Finding the Fourth Proportional to 1,278.04, 1,763.61 and 718.50

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Solution

The fourth proportional to 1,278.04, 1,763.61 and 718.50 is: 991.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.04 : 1,763.61 = 718.50 : x
  2. Step 2: Convert to fraction form
    1,278.04/1,763.61 = 718.50/x
  3. Step 3: Cross multiply
    1,278.04x = 1,763.61 × 718.50
  4. Step 4: Simplify right side
    1,278.04x = 1,267,161.75
  5. Step 5: Solve for x
    x = 1,267,161.75/1,278.04
  6. Step 6: Final answer
    x = 991.49

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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.