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Finding the Fourth Proportional to 988.68, 1,364.38 and 546.60

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Solution

The fourth proportional to 988.68, 1,364.38 and 546.60 is: 754.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.68 : 1,364.38 = 546.60 : x
  2. Step 2: Convert to fraction form
    988.68/1,364.38 = 546.60/x
  3. Step 3: Cross multiply
    988.68x = 1,364.38 × 546.60
  4. Step 4: Simplify right side
    988.68x = 745,763.29
  5. Step 5: Solve for x
    x = 745,763.29/988.68
  6. Step 6: Final answer
    x = 754.31

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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.