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Finding the Fourth Proportional to 1,564.33, 2,158.68 and 856.04

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Solution

The fourth proportional to 1,564.33, 2,158.68 and 856.04 is: 1,181.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564.33 : 2,158.68 = 856.04 : x
  2. Step 2: Convert to fraction form
    1,564.33/2,158.68 = 856.04/x
  3. Step 3: Cross multiply
    1,564.33x = 2,158.68 × 856.04
  4. Step 4: Simplify right side
    1,564.33x = 1,847,905.63
  5. Step 5: Solve for x
    x = 1,847,905.63/1,564.33
  6. Step 6: Final answer
    x = 1,181.28

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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.