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Finding the Fourth Proportional to 895.56, 1,343.32 and 318.48

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Solution

The fourth proportional to 895.56, 1,343.32 and 318.48 is: 477.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.56 : 1,343.32 = 318.48 : x
  2. Step 2: Convert to fraction form
    895.56/1,343.32 = 318.48/x
  3. Step 3: Cross multiply
    895.56x = 1,343.32 × 318.48
  4. Step 4: Simplify right side
    895.56x = 427,820.55
  5. Step 5: Solve for x
    x = 427,820.55/895.56
  6. Step 6: Final answer
    x = 477.71

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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.