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Finding the Fourth Proportional to 895.67, 1,343.69 and 318.53

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Solution

The fourth proportional to 895.67, 1,343.69 and 318.53 is: 477.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.67 : 1,343.69 = 318.53 : x
  2. Step 2: Convert to fraction form
    895.67/1,343.69 = 318.53/x
  3. Step 3: Cross multiply
    895.67x = 1,343.69 × 318.53
  4. Step 4: Simplify right side
    895.67x = 428,005.58
  5. Step 5: Solve for x
    x = 428,005.58/895.67
  6. Step 6: Final answer
    x = 477.86

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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.