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Finding the Fourth Proportional to 543.50, 815.47 and 235.19

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Solution

The fourth proportional to 543.50, 815.47 and 235.19 is: 352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.50 : 815.47 = 235.19 : x
  2. Step 2: Convert to fraction form
    543.50/815.47 = 235.19/x
  3. Step 3: Cross multiply
    543.50x = 815.47 × 235.19
  4. Step 4: Simplify right side
    543.50x = 191,790.39
  5. Step 5: Solve for x
    x = 191,790.39/543.50
  6. Step 6: Final answer
    x = 352.88

Related Problems

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Half scale
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Double scale
Find fourth proportional to 544.50, 816.97 and 236.19
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.