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Finding the Fourth Proportional to 895.38, 1,342.79 and 318.14

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Solution

The fourth proportional to 895.38, 1,342.79 and 318.14 is: 477.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.38 : 1,342.79 = 318.14 : x
  2. Step 2: Convert to fraction form
    895.38/1,342.79 = 318.14/x
  3. Step 3: Cross multiply
    895.38x = 1,342.79 × 318.14
  4. Step 4: Simplify right side
    895.38x = 427,195.21
  5. Step 5: Solve for x
    x = 427,195.21/895.38
  6. Step 6: Final answer
    x = 477.11

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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.