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Finding the Fourth Proportional to 1,565.64, 2,160.51 and 866.96

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Solution

The fourth proportional to 1,565.64, 2,160.51 and 866.96 is: 1,196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.64 : 2,160.51 = 866.96 : x
  2. Step 2: Convert to fraction form
    1,565.64/2,160.51 = 866.96/x
  3. Step 3: Cross multiply
    1,565.64x = 2,160.51 × 866.96
  4. Step 4: Simplify right side
    1,565.64x = 1,873,075.75
  5. Step 5: Solve for x
    x = 1,873,075.75/1,565.64
  6. Step 6: Final answer
    x = 1,196.36

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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.