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Finding the Fourth Proportional to 618.48, 927.04 and 309.72

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Solution

The fourth proportional to 618.48, 927.04 and 309.72 is: 464.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.48 : 927.04 = 309.72 : x
  2. Step 2: Convert to fraction form
    618.48/927.04 = 309.72/x
  3. Step 3: Cross multiply
    618.48x = 927.04 × 309.72
  4. Step 4: Simplify right side
    618.48x = 287,122.83
  5. Step 5: Solve for x
    x = 287,122.83/618.48
  6. Step 6: Final answer
    x = 464.24

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.