Home / 1,390,869.20-2,085,137.40-726,021.20

Finding the Fourth Proportional to 1,390,869.20, 2,085,137.40 and 726,021.20

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Solution

The fourth proportional to 1,390,869.20, 2,085,137.40 and 726,021.20 is: 1,088,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,869.20 : 2,085,137.40 = 726,021.20 : x
  2. Step 2: Convert to fraction form
    1,390,869.20/2,085,137.40 = 726,021.20/x
  3. Step 3: Cross multiply
    1,390,869.20x = 2,085,137.40 × 726,021.20
  4. Step 4: Simplify right side
    1,390,869.20x = 1,513,853,957,312.88
  5. Step 5: Solve for x
    x = 1,513,853,957,312.88/1,390,869.20
  6. Step 6: Final answer
    x = 1,088,422.95

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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.