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Finding the Fourth Proportional to 1,122.63, 1,548.59 and 702.47

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Solution

The fourth proportional to 1,122.63, 1,548.59 and 702.47 is: 969.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.63 : 1,548.59 = 702.47 : x
  2. Step 2: Convert to fraction form
    1,122.63/1,548.59 = 702.47/x
  3. Step 3: Cross multiply
    1,122.63x = 1,548.59 × 702.47
  4. Step 4: Simplify right side
    1,122.63x = 1,087,838.02
  5. Step 5: Solve for x
    x = 1,087,838.02/1,122.63
  6. Step 6: Final answer
    x = 969.01

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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.