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Finding the Fourth Proportional to 1,947.53, 2,920.98 and 714.30

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Solution

The fourth proportional to 1,947.53, 2,920.98 and 714.30 is: 1,071.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.53 : 2,920.98 = 714.30 : x
  2. Step 2: Convert to fraction form
    1,947.53/2,920.98 = 714.30/x
  3. Step 3: Cross multiply
    1,947.53x = 2,920.98 × 714.30
  4. Step 4: Simplify right side
    1,947.53x = 2,086,456.01
  5. Step 5: Solve for x
    x = 2,086,456.01/1,947.53
  6. Step 6: Final answer
    x = 1,071.34

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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.