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Finding the Fourth Proportional to 1,121.63, 1,548.84 and 702.71

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Solution

The fourth proportional to 1,121.63, 1,548.84 and 702.71 is: 970.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.63 : 1,548.84 = 702.71 : x
  2. Step 2: Convert to fraction form
    1,121.63/1,548.84 = 702.71/x
  3. Step 3: Cross multiply
    1,121.63x = 1,548.84 × 702.71
  4. Step 4: Simplify right side
    1,121.63x = 1,088,376.98
  5. Step 5: Solve for x
    x = 1,088,376.98/1,121.63
  6. Step 6: Final answer
    x = 970.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.