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Finding the Fourth Proportional to 988.08, 1,362.87 and 752.18

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Solution

The fourth proportional to 988.08, 1,362.87 and 752.18 is: 1,037.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.08 : 1,362.87 = 752.18 : x
  2. Step 2: Convert to fraction form
    988.08/1,362.87 = 752.18/x
  3. Step 3: Cross multiply
    988.08x = 1,362.87 × 752.18
  4. Step 4: Simplify right side
    988.08x = 1,025,116.74
  5. Step 5: Solve for x
    x = 1,025,116.74/988.08
  6. Step 6: Final answer
    x = 1,037.48

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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.