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Finding the Fourth Proportional to 1,133.79, 1,698.56 and 716.42

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Solution

The fourth proportional to 1,133.79, 1,698.56 and 716.42 is: 1,073.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.79 : 1,698.56 = 716.42 : x
  2. Step 2: Convert to fraction form
    1,133.79/1,698.56 = 716.42/x
  3. Step 3: Cross multiply
    1,133.79x = 1,698.56 × 716.42
  4. Step 4: Simplify right side
    1,133.79x = 1,216,882.02
  5. Step 5: Solve for x
    x = 1,216,882.02/1,133.79
  6. Step 6: Final answer
    x = 1,073.29

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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.