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Finding the Fourth Proportional to 838.57, 1,157.17 and 465.52

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Solution

The fourth proportional to 838.57, 1,157.17 and 465.52 is: 642.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.57 : 1,157.17 = 465.52 : x
  2. Step 2: Convert to fraction form
    838.57/1,157.17 = 465.52/x
  3. Step 3: Cross multiply
    838.57x = 1,157.17 × 465.52
  4. Step 4: Simplify right side
    838.57x = 538,685.78
  5. Step 5: Solve for x
    x = 538,685.78/838.57
  6. Step 6: Final answer
    x = 642.39

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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.