Home / 656,143.20-984,214.80-212,911.20

Finding the Fourth Proportional to 656,143.20, 984,214.80 and 212,911.20

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Solution

The fourth proportional to 656,143.20, 984,214.80 and 212,911.20 is: 319,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,143.20 : 984,214.80 = 212,911.20 : x
  2. Step 2: Convert to fraction form
    656,143.20/984,214.80 = 212,911.20/x
  3. Step 3: Cross multiply
    656,143.20x = 984,214.80 × 212,911.20
  4. Step 4: Simplify right side
    656,143.20x = 209,550,354,125.76
  5. Step 5: Solve for x
    x = 209,550,354,125.76/656,143.20
  6. Step 6: Final answer
    x = 319,366.80

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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.