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Finding the Fourth Proportional to 543.36, 815.10 and 158.64

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Solution

The fourth proportional to 543.36, 815.10 and 158.64 is: 237.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.36 : 815.10 = 158.64 : x
  2. Step 2: Convert to fraction form
    543.36/815.10 = 158.64/x
  3. Step 3: Cross multiply
    543.36x = 815.10 × 158.64
  4. Step 4: Simplify right side
    543.36x = 129,307.46
  5. Step 5: Solve for x
    x = 129,307.46/543.36
  6. Step 6: Final answer
    x = 237.98

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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.