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Finding the Fourth Proportional to 895.33, 1,343.20 and 318.21

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Solution

The fourth proportional to 895.33, 1,343.20 and 318.21 is: 477.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.33 : 1,343.20 = 318.21 : x
  2. Step 2: Convert to fraction form
    895.33/1,343.20 = 318.21/x
  3. Step 3: Cross multiply
    895.33x = 1,343.20 × 318.21
  4. Step 4: Simplify right side
    895.33x = 427,419.67
  5. Step 5: Solve for x
    x = 427,419.67/895.33
  6. Step 6: Final answer
    x = 477.39

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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.