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Finding the Fourth Proportional to 612.96, 919.38 and 180.12

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Solution

The fourth proportional to 612.96, 919.38 and 180.12 is: 270.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.96 : 919.38 = 180.12 : x
  2. Step 2: Convert to fraction form
    612.96/919.38 = 180.12/x
  3. Step 3: Cross multiply
    612.96x = 919.38 × 180.12
  4. Step 4: Simplify right side
    612.96x = 165,598.73
  5. Step 5: Solve for x
    x = 165,598.73/612.96
  6. Step 6: Final answer
    x = 270.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.