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Finding the Fourth Proportional to 894.75, 1,342.13 and 286.75

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Solution

The fourth proportional to 894.75, 1,342.13 and 286.75 is: 430.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.75 : 1,342.13 = 286.75 : x
  2. Step 2: Convert to fraction form
    894.75/1,342.13 = 286.75/x
  3. Step 3: Cross multiply
    894.75x = 1,342.13 × 286.75
  4. Step 4: Simplify right side
    894.75x = 384,855.78
  5. Step 5: Solve for x
    x = 384,855.78/894.75
  6. Step 6: Final answer
    x = 430.13

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.