Home / 1,715.90-2,574.45-742.70

Finding the Fourth Proportional to 1,715.90, 2,574.45 and 742.70

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Solution

The fourth proportional to 1,715.90, 2,574.45 and 742.70 is: 1,114.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,715.90 : 2,574.45 = 742.70 : x
  2. Step 2: Convert to fraction form
    1,715.90/2,574.45 = 742.70/x
  3. Step 3: Cross multiply
    1,715.90x = 2,574.45 × 742.70
  4. Step 4: Simplify right side
    1,715.90x = 1,912,044.02
  5. Step 5: Solve for x
    x = 1,912,044.02/1,715.90
  6. Step 6: Final answer
    x = 1,114.31

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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.