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Finding the Fourth Proportional to 718.99, 1,077.64 and 711.29

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Solution

The fourth proportional to 718.99, 1,077.64 and 711.29 is: 1,066.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.99 : 1,077.64 = 711.29 : x
  2. Step 2: Convert to fraction form
    718.99/1,077.64 = 711.29/x
  3. Step 3: Cross multiply
    718.99x = 1,077.64 × 711.29
  4. Step 4: Simplify right side
    718.99x = 766,515.47
  5. Step 5: Solve for x
    x = 766,515.47/718.99
  6. Step 6: Final answer
    x = 1,066.10

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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.