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Finding the Fourth Proportional to 654.86, 981.18 and 325.36

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Solution

The fourth proportional to 654.86, 981.18 and 325.36 is: 487.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.86 : 981.18 = 325.36 : x
  2. Step 2: Convert to fraction form
    654.86/981.18 = 325.36/x
  3. Step 3: Cross multiply
    654.86x = 981.18 × 325.36
  4. Step 4: Simplify right side
    654.86x = 319,236.72
  5. Step 5: Solve for x
    x = 319,236.72/654.86
  6. Step 6: Final answer
    x = 487.49

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.