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Finding the Fourth Proportional to 938.78, 1,295.33 and 534.93

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Solution

The fourth proportional to 938.78, 1,295.33 and 534.93 is: 738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.78 : 1,295.33 = 534.93 : x
  2. Step 2: Convert to fraction form
    938.78/1,295.33 = 534.93/x
  3. Step 3: Cross multiply
    938.78x = 1,295.33 × 534.93
  4. Step 4: Simplify right side
    938.78x = 692,908.20
  5. Step 5: Solve for x
    x = 692,908.20/938.78
  6. Step 6: Final answer
    x = 738.10

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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.