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Finding the Fourth Proportional to 1,702.40, 2,553.32 and 548

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Solution

The fourth proportional to 1,702.40, 2,553.32 and 548 is: 821.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,702.40 : 2,553.32 = 548 : x
  2. Step 2: Convert to fraction form
    1,702.40/2,553.32 = 548/x
  3. Step 3: Cross multiply
    1,702.40x = 2,553.32 × 548
  4. Step 4: Simplify right side
    1,702.40x = 1,399,219.36
  5. Step 5: Solve for x
    x = 1,399,219.36/1,702.40
  6. Step 6: Final answer
    x = 821.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.