Home / 1,993,206.40-2,990,101.20-645,139.60

Finding the Fourth Proportional to 1,993,206.40, 2,990,101.20 and 645,139.60

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Solution

The fourth proportional to 1,993,206.40, 2,990,101.20 and 645,139.60 is: 967,803.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,206.40 : 2,990,101.20 = 645,139.60 : x
  2. Step 2: Convert to fraction form
    1,993,206.40/2,990,101.20 = 645,139.60/x
  3. Step 3: Cross multiply
    1,993,206.40x = 2,990,101.20 × 645,139.60
  4. Step 4: Simplify right side
    1,993,206.40x = 1,929,032,692,127.52
  5. Step 5: Solve for x
    x = 1,929,032,692,127.52/1,993,206.40
  6. Step 6: Final answer
    x = 967,803.78

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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.