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Finding the Fourth Proportional to 402.45, 555.35 and 236.76

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Solution

The fourth proportional to 402.45, 555.35 and 236.76 is: 326.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.45 : 555.35 = 236.76 : x
  2. Step 2: Convert to fraction form
    402.45/555.35 = 236.76/x
  3. Step 3: Cross multiply
    402.45x = 555.35 × 236.76
  4. Step 4: Simplify right side
    402.45x = 131,483.48
  5. Step 5: Solve for x
    x = 131,483.48/402.45
  6. Step 6: Final answer
    x = 326.71

Related Problems

Find fourth proportional to 201.23, 277.67 and 118.38
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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.