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Finding the Fourth Proportional to 613.89, 920.81 and 203.02

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Solution

The fourth proportional to 613.89, 920.81 and 203.02 is: 304.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.89 : 920.81 = 203.02 : x
  2. Step 2: Convert to fraction form
    613.89/920.81 = 203.02/x
  3. Step 3: Cross multiply
    613.89x = 920.81 × 203.02
  4. Step 4: Simplify right side
    613.89x = 186,937.23
  5. Step 5: Solve for x
    x = 186,937.23/613.89
  6. Step 6: Final answer
    x = 304.51

Related Problems

Find fourth proportional to 306.95, 460.40 and 101.51
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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.