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Finding the Fourth Proportional to 938.32, 1,294.28 and 570.32

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Solution

The fourth proportional to 938.32, 1,294.28 and 570.32 is: 786.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.32 : 1,294.28 = 570.32 : x
  2. Step 2: Convert to fraction form
    938.32/1,294.28 = 570.32/x
  3. Step 3: Cross multiply
    938.32x = 1,294.28 × 570.32
  4. Step 4: Simplify right side
    938.32x = 738,153.77
  5. Step 5: Solve for x
    x = 738,153.77/938.32
  6. Step 6: Final answer
    x = 786.68

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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.