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Finding the Fourth Proportional to 615.13, 848.55 and 418.57

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Solution

The fourth proportional to 615.13, 848.55 and 418.57 is: 577.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.13 : 848.55 = 418.57 : x
  2. Step 2: Convert to fraction form
    615.13/848.55 = 418.57/x
  3. Step 3: Cross multiply
    615.13x = 848.55 × 418.57
  4. Step 4: Simplify right side
    615.13x = 355,177.57
  5. Step 5: Solve for x
    x = 355,177.57/615.13
  6. Step 6: Final answer
    x = 577.40

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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.