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Finding the Fourth Proportional to 543.51, 815.20 and 235.31

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Solution

The fourth proportional to 543.51, 815.20 and 235.31 is: 352.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.51 : 815.20 = 235.31 : x
  2. Step 2: Convert to fraction form
    543.51/815.20 = 235.31/x
  3. Step 3: Cross multiply
    543.51x = 815.20 × 235.31
  4. Step 4: Simplify right side
    543.51x = 191,820.05
  5. Step 5: Solve for x
    x = 191,820.05/543.51
  6. Step 6: Final answer
    x = 352.93

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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.