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Finding the Fourth Proportional to 228,997.20, 343,495.80 and 158,138.40

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Solution

The fourth proportional to 228,997.20, 343,495.80 and 158,138.40 is: 237,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,997.20 : 343,495.80 = 158,138.40 : x
  2. Step 2: Convert to fraction form
    228,997.20/343,495.80 = 158,138.40/x
  3. Step 3: Cross multiply
    228,997.20x = 343,495.80 × 158,138.40
  4. Step 4: Simplify right side
    228,997.20x = 54,319,876,218.72
  5. Step 5: Solve for x
    x = 54,319,876,218.72/228,997.20
  6. Step 6: Final answer
    x = 237,207.60

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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.