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Finding the Fourth Proportional to 1,555.29, 2,146.29 and 856.66

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Solution

The fourth proportional to 1,555.29, 2,146.29 and 856.66 is: 1,182.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.29 : 2,146.29 = 856.66 : x
  2. Step 2: Convert to fraction form
    1,555.29/2,146.29 = 856.66/x
  3. Step 3: Cross multiply
    1,555.29x = 2,146.29 × 856.66
  4. Step 4: Simplify right side
    1,555.29x = 1,838,640.79
  5. Step 5: Solve for x
    x = 1,838,640.79/1,555.29
  6. Step 6: Final answer
    x = 1,182.19

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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.