Home / 831,440.70-1,247,161.05-432,859.95

Finding the Fourth Proportional to 831,440.70, 1,247,161.05 and 432,859.95

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Solution

The fourth proportional to 831,440.70, 1,247,161.05 and 432,859.95 is: 649,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,440.70 : 1,247,161.05 = 432,859.95 : x
  2. Step 2: Convert to fraction form
    831,440.70/1,247,161.05 = 432,859.95/x
  3. Step 3: Cross multiply
    831,440.70x = 1,247,161.05 × 432,859.95
  4. Step 4: Simplify right side
    831,440.70x = 539,846,069,744.95
  5. Step 5: Solve for x
    x = 539,846,069,744.95/831,440.70
  6. Step 6: Final answer
    x = 649,289.93

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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.