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Finding the Fourth Proportional to 615.43, 848.75 and 484.21

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Solution

The fourth proportional to 615.43, 848.75 and 484.21 is: 667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.43 : 848.75 = 484.21 : x
  2. Step 2: Convert to fraction form
    615.43/848.75 = 484.21/x
  3. Step 3: Cross multiply
    615.43x = 848.75 × 484.21
  4. Step 4: Simplify right side
    615.43x = 410,966.57
  5. Step 5: Solve for x
    x = 410,966.57/615.43
  6. Step 6: Final answer
    x = 667.78

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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.