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Finding the Fourth Proportional to 1,560.96, 2,154.15 and 862.29

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Solution

The fourth proportional to 1,560.96, 2,154.15 and 862.29 is: 1,189.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.96 : 2,154.15 = 862.29 : x
  2. Step 2: Convert to fraction form
    1,560.96/2,154.15 = 862.29/x
  3. Step 3: Cross multiply
    1,560.96x = 2,154.15 × 862.29
  4. Step 4: Simplify right side
    1,560.96x = 1,857,502.00
  5. Step 5: Solve for x
    x = 1,857,502.00/1,560.96
  6. Step 6: Final answer
    x = 1,189.97

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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.