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Finding the Fourth Proportional to 512,424.30, 768,636.45 and 180,000.30

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Solution

The fourth proportional to 512,424.30, 768,636.45 and 180,000.30 is: 270,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,424.30 : 768,636.45 = 180,000.30 : x
  2. Step 2: Convert to fraction form
    512,424.30/768,636.45 = 180,000.30/x
  3. Step 3: Cross multiply
    512,424.30x = 768,636.45 × 180,000.30
  4. Step 4: Simplify right side
    512,424.30x = 138,354,791,590.94
  5. Step 5: Solve for x
    x = 138,354,791,590.94/512,424.30
  6. Step 6: Final answer
    x = 270,000.45

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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.