Home / 1,428,015.20-2,142,022.80-628,885.40

Finding the Fourth Proportional to 1,428,015.20, 2,142,022.80 and 628,885.40

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Solution

The fourth proportional to 1,428,015.20, 2,142,022.80 and 628,885.40 is: 943,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,015.20 : 2,142,022.80 = 628,885.40 : x
  2. Step 2: Convert to fraction form
    1,428,015.20/2,142,022.80 = 628,885.40/x
  3. Step 3: Cross multiply
    1,428,015.20x = 2,142,022.80 × 628,885.40
  4. Step 4: Simplify right side
    1,428,015.20x = 1,347,086,865,387.12
  5. Step 5: Solve for x
    x = 1,347,086,865,387.12/1,428,015.20
  6. Step 6: Final answer
    x = 943,328.10

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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.