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Finding the Fourth Proportional to 455,363.20, 683,044.80 and 139,819.60

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Solution

The fourth proportional to 455,363.20, 683,044.80 and 139,819.60 is: 209,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,363.20 : 683,044.80 = 139,819.60 : x
  2. Step 2: Convert to fraction form
    455,363.20/683,044.80 = 139,819.60/x
  3. Step 3: Cross multiply
    455,363.20x = 683,044.80 × 139,819.60
  4. Step 4: Simplify right side
    455,363.20x = 95,503,050,718.08
  5. Step 5: Solve for x
    x = 95,503,050,718.08/455,363.20
  6. Step 6: Final answer
    x = 209,729.40

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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.