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Finding the Fourth Proportional to 1,064.28, 1,593.64 and 911.16

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Solution

The fourth proportional to 1,064.28, 1,593.64 and 911.16 is: 1,364.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.28 : 1,593.64 = 911.16 : x
  2. Step 2: Convert to fraction form
    1,064.28/1,593.64 = 911.16/x
  3. Step 3: Cross multiply
    1,064.28x = 1,593.64 × 911.16
  4. Step 4: Simplify right side
    1,064.28x = 1,452,061.02
  5. Step 5: Solve for x
    x = 1,452,061.02/1,064.28
  6. Step 6: Final answer
    x = 1,364.36

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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.