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Finding the Fourth Proportional to 1,123.95, 1,682.72 and 893.18

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Solution

The fourth proportional to 1,123.95, 1,682.72 and 893.18 is: 1,337.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.95 : 1,682.72 = 893.18 : x
  2. Step 2: Convert to fraction form
    1,123.95/1,682.72 = 893.18/x
  3. Step 3: Cross multiply
    1,123.95x = 1,682.72 × 893.18
  4. Step 4: Simplify right side
    1,123.95x = 1,502,958.97
  5. Step 5: Solve for x
    x = 1,502,958.97/1,123.95
  6. Step 6: Final answer
    x = 1,337.21

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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.