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Finding the Fourth Proportional to 1,135.14, 1,565.16 and 1,065.08

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Solution

The fourth proportional to 1,135.14, 1,565.16 and 1,065.08 is: 1,468.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.14 : 1,565.16 = 1,065.08 : x
  2. Step 2: Convert to fraction form
    1,135.14/1,565.16 = 1,065.08/x
  3. Step 3: Cross multiply
    1,135.14x = 1,565.16 × 1,065.08
  4. Step 4: Simplify right side
    1,135.14x = 1,667,007.46
  5. Step 5: Solve for x
    x = 1,667,007.46/1,135.14
  6. Step 6: Final answer
    x = 1,468.55

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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.