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Finding the Fourth Proportional to 455,440.80, 683,161.20 and 139,856.70

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Solution

The fourth proportional to 455,440.80, 683,161.20 and 139,856.70 is: 209,785.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,440.80 : 683,161.20 = 139,856.70 : x
  2. Step 2: Convert to fraction form
    455,440.80/683,161.20 = 139,856.70/x
  3. Step 3: Cross multiply
    455,440.80x = 683,161.20 × 139,856.70
  4. Step 4: Simplify right side
    455,440.80x = 95,544,671,000.04
  5. Step 5: Solve for x
    x = 95,544,671,000.04/455,440.80
  6. Step 6: Final answer
    x = 209,785.05

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Similar ratio
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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.