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Finding the Fourth Proportional to 1,474.17, 2,211.72 and 856.58

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Solution

The fourth proportional to 1,474.17, 2,211.72 and 856.58 is: 1,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.17 : 2,211.72 = 856.58 : x
  2. Step 2: Convert to fraction form
    1,474.17/2,211.72 = 856.58/x
  3. Step 3: Cross multiply
    1,474.17x = 2,211.72 × 856.58
  4. Step 4: Simplify right side
    1,474.17x = 1,894,502.05
  5. Step 5: Solve for x
    x = 1,894,502.05/1,474.17
  6. Step 6: Final answer
    x = 1,285.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.