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Finding the Fourth Proportional to 648.58, 972.18 and 323.22

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Solution

The fourth proportional to 648.58, 972.18 and 323.22 is: 484.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.58 : 972.18 = 323.22 : x
  2. Step 2: Convert to fraction form
    648.58/972.18 = 323.22/x
  3. Step 3: Cross multiply
    648.58x = 972.18 × 323.22
  4. Step 4: Simplify right side
    648.58x = 314,228.02
  5. Step 5: Solve for x
    x = 314,228.02/648.58
  6. Step 6: Final answer
    x = 484.49

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.