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Finding the Fourth Proportional to 938.47, 1,295.17 and 623.18

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Solution

The fourth proportional to 938.47, 1,295.17 and 623.18 is: 860.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.47 : 1,295.17 = 623.18 : x
  2. Step 2: Convert to fraction form
    938.47/1,295.17 = 623.18/x
  3. Step 3: Cross multiply
    938.47x = 1,295.17 × 623.18
  4. Step 4: Simplify right side
    938.47x = 807,116.01
  5. Step 5: Solve for x
    x = 807,116.01/938.47
  6. Step 6: Final answer
    x = 860.04

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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.