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Finding the Fourth Proportional to 1,277.71, 1,763.29 and 718.17

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Solution

The fourth proportional to 1,277.71, 1,763.29 and 718.17 is: 991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.71 : 1,763.29 = 718.17 : x
  2. Step 2: Convert to fraction form
    1,277.71/1,763.29 = 718.17/x
  3. Step 3: Cross multiply
    1,277.71x = 1,763.29 × 718.17
  4. Step 4: Simplify right side
    1,277.71x = 1,266,336.26
  5. Step 5: Solve for x
    x = 1,266,336.26/1,277.71
  6. Step 6: Final answer
    x = 991.10

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1.5x scale

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.