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Finding the Fourth Proportional to 895.78, 1,342.86 and 318.52

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Solution

The fourth proportional to 895.78, 1,342.86 and 318.52 is: 477.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.78 : 1,342.86 = 318.52 : x
  2. Step 2: Convert to fraction form
    895.78/1,342.86 = 318.52/x
  3. Step 3: Cross multiply
    895.78x = 1,342.86 × 318.52
  4. Step 4: Simplify right side
    895.78x = 427,727.77
  5. Step 5: Solve for x
    x = 427,727.77/895.78
  6. Step 6: Final answer
    x = 477.49

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Double scale
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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.