Home / 1,259,428.20-1,889,142.30-1,210,439.40

Finding the Fourth Proportional to 1,259,428.20, 1,889,142.30 and 1,210,439.40

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Solution

The fourth proportional to 1,259,428.20, 1,889,142.30 and 1,210,439.40 is: 1,815,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,428.20 : 1,889,142.30 = 1,210,439.40 : x
  2. Step 2: Convert to fraction form
    1,259,428.20/1,889,142.30 = 1,210,439.40/x
  3. Step 3: Cross multiply
    1,259,428.20x = 1,889,142.30 × 1,210,439.40
  4. Step 4: Simplify right side
    1,259,428.20x = 2,286,692,272,126.62
  5. Step 5: Solve for x
    x = 2,286,692,272,126.62/1,259,428.20
  6. Step 6: Final answer
    x = 1,815,659.10

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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.