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Finding the Fourth Proportional to 895.51, 1,342.83 and 279.28

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Solution

The fourth proportional to 895.51, 1,342.83 and 279.28 is: 418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.51 : 1,342.83 = 279.28 : x
  2. Step 2: Convert to fraction form
    895.51/1,342.83 = 279.28/x
  3. Step 3: Cross multiply
    895.51x = 1,342.83 × 279.28
  4. Step 4: Simplify right side
    895.51x = 375,022.21
  5. Step 5: Solve for x
    x = 375,022.21/895.51
  6. Step 6: Final answer
    x = 418.78

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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.