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Finding the Fourth Proportional to 615.78, 849.57 and 382.89

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Solution

The fourth proportional to 615.78, 849.57 and 382.89 is: 528.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.78 : 849.57 = 382.89 : x
  2. Step 2: Convert to fraction form
    615.78/849.57 = 382.89/x
  3. Step 3: Cross multiply
    615.78x = 849.57 × 382.89
  4. Step 4: Simplify right side
    615.78x = 325,291.86
  5. Step 5: Solve for x
    x = 325,291.86/615.78
  6. Step 6: Final answer
    x = 528.26

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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.