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Finding the Fourth Proportional to 989.07, 1,364.88 and 546.96

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Solution

The fourth proportional to 989.07, 1,364.88 and 546.96 is: 754.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.07 : 1,364.88 = 546.96 : x
  2. Step 2: Convert to fraction form
    989.07/1,364.88 = 546.96/x
  3. Step 3: Cross multiply
    989.07x = 1,364.88 × 546.96
  4. Step 4: Simplify right side
    989.07x = 746,541.93
  5. Step 5: Solve for x
    x = 746,541.93/989.07
  6. Step 6: Final answer
    x = 754.79

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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.