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Finding the Fourth Proportional to 648.39, 972.59 and 186.18

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Solution

The fourth proportional to 648.39, 972.59 and 186.18 is: 279.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.39 : 972.59 = 186.18 : x
  2. Step 2: Convert to fraction form
    648.39/972.59 = 186.18/x
  3. Step 3: Cross multiply
    648.39x = 972.59 × 186.18
  4. Step 4: Simplify right side
    648.39x = 181,076.81
  5. Step 5: Solve for x
    x = 181,076.81/648.39
  6. Step 6: Final answer
    x = 279.27

Related Problems

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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.