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Finding the Fourth Proportional to 1,293.92, 1,939.16 and 471.42

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Solution

The fourth proportional to 1,293.92, 1,939.16 and 471.42 is: 706.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.92 : 1,939.16 = 471.42 : x
  2. Step 2: Convert to fraction form
    1,293.92/1,939.16 = 471.42/x
  3. Step 3: Cross multiply
    1,293.92x = 1,939.16 × 471.42
  4. Step 4: Simplify right side
    1,293.92x = 914,146.75
  5. Step 5: Solve for x
    x = 914,146.75/1,293.92
  6. Step 6: Final answer
    x = 706.49

Related Problems

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Double scale
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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.