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Finding the Fourth Proportional to 1,565.44, 2,160.20 and 866.84

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Solution

The fourth proportional to 1,565.44, 2,160.20 and 866.84 is: 1,196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.44 : 2,160.20 = 866.84 : x
  2. Step 2: Convert to fraction form
    1,565.44/2,160.20 = 866.84/x
  3. Step 3: Cross multiply
    1,565.44x = 2,160.20 × 866.84
  4. Step 4: Simplify right side
    1,565.44x = 1,872,547.77
  5. Step 5: Solve for x
    x = 1,872,547.77/1,565.44
  6. Step 6: Final answer
    x = 1,196.18

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1.5x scale

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.