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Finding the Fourth Proportional to 615.08, 848.59 and 394.15

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Solution

The fourth proportional to 615.08, 848.59 and 394.15 is: 543.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.08 : 848.59 = 394.15 : x
  2. Step 2: Convert to fraction form
    615.08/848.59 = 394.15/x
  3. Step 3: Cross multiply
    615.08x = 848.59 × 394.15
  4. Step 4: Simplify right side
    615.08x = 334,472.45
  5. Step 5: Solve for x
    x = 334,472.45/615.08
  6. Step 6: Final answer
    x = 543.79

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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.