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Finding the Fourth Proportional to 1,734.35, 2,393.40 and 988.31

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Solution

The fourth proportional to 1,734.35, 2,393.40 and 988.31 is: 1,363.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,734.35 : 2,393.40 = 988.31 : x
  2. Step 2: Convert to fraction form
    1,734.35/2,393.40 = 988.31/x
  3. Step 3: Cross multiply
    1,734.35x = 2,393.40 × 988.31
  4. Step 4: Simplify right side
    1,734.35x = 2,365,421.15
  5. Step 5: Solve for x
    x = 2,365,421.15/1,734.35
  6. Step 6: Final answer
    x = 1,363.87

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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.