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Finding the Fourth Proportional to 920.13, 1,380.19 and 236.13

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Solution

The fourth proportional to 920.13, 1,380.19 and 236.13 is: 354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.13 : 1,380.19 = 236.13 : x
  2. Step 2: Convert to fraction form
    920.13/1,380.19 = 236.13/x
  3. Step 3: Cross multiply
    920.13x = 1,380.19 × 236.13
  4. Step 4: Simplify right side
    920.13x = 325,897.36
  5. Step 5: Solve for x
    x = 325,897.36/920.13
  6. Step 6: Final answer
    x = 354.19

Related Problems

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Half scale
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Double scale
Find fourth proportional to 921.13, 1,381.69 and 237.13
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.