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Finding the Fourth Proportional to 615.33, 849.29 and 438.53

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Solution

The fourth proportional to 615.33, 849.29 and 438.53 is: 605.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.33 : 849.29 = 438.53 : x
  2. Step 2: Convert to fraction form
    615.33/849.29 = 438.53/x
  3. Step 3: Cross multiply
    615.33x = 849.29 × 438.53
  4. Step 4: Simplify right side
    615.33x = 372,432.70
  5. Step 5: Solve for x
    x = 372,432.70/615.33
  6. Step 6: Final answer
    x = 605.26

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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.