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Finding the Fourth Proportional to 543,612.20, 815,612.70 and 228,165.80

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Solution

The fourth proportional to 543,612.20, 815,612.70 and 228,165.80 is: 342,330.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,612.20 : 815,612.70 = 228,165.80 : x
  2. Step 2: Convert to fraction form
    543,612.20/815,612.70 = 228,165.80/x
  3. Step 3: Cross multiply
    543,612.20x = 815,612.70 × 228,165.80
  4. Step 4: Simplify right side
    543,612.20x = 186,094,924,185.66
  5. Step 5: Solve for x
    x = 186,094,924,185.66/543,612.20
  6. Step 6: Final answer
    x = 342,330.29

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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.