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Finding the Fourth Proportional to 1,565.07, 2,159.79 and 866.45

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Solution

The fourth proportional to 1,565.07, 2,159.79 and 866.45 is: 1,195.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.07 : 2,159.79 = 866.45 : x
  2. Step 2: Convert to fraction form
    1,565.07/2,159.79 = 866.45/x
  3. Step 3: Cross multiply
    1,565.07x = 2,159.79 × 866.45
  4. Step 4: Simplify right side
    1,565.07x = 1,871,350.05
  5. Step 5: Solve for x
    x = 1,871,350.05/1,565.07
  6. Step 6: Final answer
    x = 1,195.70

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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.