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Finding the Fourth Proportional to 1,273.79, 1,757.80 and 714.26

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Solution

The fourth proportional to 1,273.79, 1,757.80 and 714.26 is: 985.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.79 : 1,757.80 = 714.26 : x
  2. Step 2: Convert to fraction form
    1,273.79/1,757.80 = 714.26/x
  3. Step 3: Cross multiply
    1,273.79x = 1,757.80 × 714.26
  4. Step 4: Simplify right side
    1,273.79x = 1,255,526.23
  5. Step 5: Solve for x
    x = 1,255,526.23/1,273.79
  6. Step 6: Final answer
    x = 985.66

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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.