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Finding the Fourth Proportional to 938.06, 1,294.65 and 704.78

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Solution

The fourth proportional to 938.06, 1,294.65 and 704.78 is: 972.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.06 : 1,294.65 = 704.78 : x
  2. Step 2: Convert to fraction form
    938.06/1,294.65 = 704.78/x
  3. Step 3: Cross multiply
    938.06x = 1,294.65 × 704.78
  4. Step 4: Simplify right side
    938.06x = 912,443.43
  5. Step 5: Solve for x
    x = 912,443.43/938.06
  6. Step 6: Final answer
    x = 972.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.