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Finding the Fourth Proportional to 615.62, 848.19 and 405.42

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Solution

The fourth proportional to 615.62, 848.19 and 405.42 is: 558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.62 : 848.19 = 405.42 : x
  2. Step 2: Convert to fraction form
    615.62/848.19 = 405.42/x
  3. Step 3: Cross multiply
    615.62x = 848.19 × 405.42
  4. Step 4: Simplify right side
    615.62x = 343,873.19
  5. Step 5: Solve for x
    x = 343,873.19/615.62
  6. Step 6: Final answer
    x = 558.58

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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.