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Finding the Fourth Proportional to 628.38, 942.57 and 243.66

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Solution

The fourth proportional to 628.38, 942.57 and 243.66 is: 365.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.38 : 942.57 = 243.66 : x
  2. Step 2: Convert to fraction form
    628.38/942.57 = 243.66/x
  3. Step 3: Cross multiply
    628.38x = 942.57 × 243.66
  4. Step 4: Simplify right side
    628.38x = 229,666.61
  5. Step 5: Solve for x
    x = 229,666.61/628.38
  6. Step 6: Final answer
    x = 365.49

Related Problems

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Double scale
Find fourth proportional to 629.38, 944.07 and 244.66
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.