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Finding the Fourth Proportional to 654.88, 981.36 and 325.44

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Solution

The fourth proportional to 654.88, 981.36 and 325.44 is: 487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.88 : 981.36 = 325.44 : x
  2. Step 2: Convert to fraction form
    654.88/981.36 = 325.44/x
  3. Step 3: Cross multiply
    654.88x = 981.36 × 325.44
  4. Step 4: Simplify right side
    654.88x = 319,373.80
  5. Step 5: Solve for x
    x = 319,373.80/654.88
  6. Step 6: Final answer
    x = 487.68

Related Problems

Find fourth proportional to 327.44, 490.68 and 162.72
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.