Home / 918,806.20-1,378,524.90-413,721.40

Finding the Fourth Proportional to 918,806.20, 1,378,524.90 and 413,721.40

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Solution

The fourth proportional to 918,806.20, 1,378,524.90 and 413,721.40 is: 620,724.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,806.20 : 1,378,524.90 = 413,721.40 : x
  2. Step 2: Convert to fraction form
    918,806.20/1,378,524.90 = 413,721.40/x
  3. Step 3: Cross multiply
    918,806.20x = 1,378,524.90 × 413,721.40
  4. Step 4: Simplify right side
    918,806.20x = 570,325,251,562.86
  5. Step 5: Solve for x
    x = 570,325,251,562.86/918,806.20
  6. Step 6: Final answer
    x = 620,724.21

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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.