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Finding the Fourth Proportional to 718.89, 1,075.35 and 675.15

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Solution

The fourth proportional to 718.89, 1,075.35 and 675.15 is: 1,009.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.89 : 1,075.35 = 675.15 : x
  2. Step 2: Convert to fraction form
    718.89/1,075.35 = 675.15/x
  3. Step 3: Cross multiply
    718.89x = 1,075.35 × 675.15
  4. Step 4: Simplify right side
    718.89x = 726,022.55
  5. Step 5: Solve for x
    x = 726,022.55/718.89
  6. Step 6: Final answer
    x = 1,009.92

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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.