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Finding the Fourth Proportional to 612.18, 844.02 and 378.90

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Solution

The fourth proportional to 612.18, 844.02 and 378.90 is: 522.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.18 : 844.02 = 378.90 : x
  2. Step 2: Convert to fraction form
    612.18/844.02 = 378.90/x
  3. Step 3: Cross multiply
    612.18x = 844.02 × 378.90
  4. Step 4: Simplify right side
    612.18x = 319,799.18
  5. Step 5: Solve for x
    x = 319,799.18/612.18
  6. Step 6: Final answer
    x = 522.39

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1.5x scale

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.