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Finding the Fourth Proportional to 615.62, 848.60 and 418.79

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Solution

The fourth proportional to 615.62, 848.60 and 418.79 is: 577.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.62 : 848.60 = 418.79 : x
  2. Step 2: Convert to fraction form
    615.62/848.60 = 418.79/x
  3. Step 3: Cross multiply
    615.62x = 848.60 × 418.79
  4. Step 4: Simplify right side
    615.62x = 355,383.10
  5. Step 5: Solve for x
    x = 355,383.10/615.62
  6. Step 6: Final answer
    x = 577.28

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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.