Home / 1,993,780.40-2,990,962.20-645,713.60

Finding the Fourth Proportional to 1,993,780.40, 2,990,962.20 and 645,713.60

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Solution

The fourth proportional to 1,993,780.40, 2,990,962.20 and 645,713.60 is: 968,664.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,780.40 : 2,990,962.20 = 645,713.60 : x
  2. Step 2: Convert to fraction form
    1,993,780.40/2,990,962.20 = 645,713.60/x
  3. Step 3: Cross multiply
    1,993,780.40x = 2,990,962.20 × 645,713.60
  4. Step 4: Simplify right side
    1,993,780.40x = 1,931,304,969,625.92
  5. Step 5: Solve for x
    x = 1,931,304,969,625.92/1,993,780.40
  6. Step 6: Final answer
    x = 968,664.84

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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.