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Finding the Fourth Proportional to 818,679.60, 1,228,019.40 and 369,907.20

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Solution

The fourth proportional to 818,679.60, 1,228,019.40 and 369,907.20 is: 554,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,679.60 : 1,228,019.40 = 369,907.20 : x
  2. Step 2: Convert to fraction form
    818,679.60/1,228,019.40 = 369,907.20/x
  3. Step 3: Cross multiply
    818,679.60x = 1,228,019.40 × 369,907.20
  4. Step 4: Simplify right side
    818,679.60x = 454,253,217,799.68
  5. Step 5: Solve for x
    x = 454,253,217,799.68/818,679.60
  6. Step 6: Final answer
    x = 554,860.80

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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.