Home / 819,621.40-1,229,432.10-689,713.60

Finding the Fourth Proportional to 819,621.40, 1,229,432.10 and 689,713.60

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Solution

The fourth proportional to 819,621.40, 1,229,432.10 and 689,713.60 is: 1,034,570.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,621.40 : 1,229,432.10 = 689,713.60 : x
  2. Step 2: Convert to fraction form
    819,621.40/1,229,432.10 = 689,713.60/x
  3. Step 3: Cross multiply
    819,621.40x = 1,229,432.10 × 689,713.60
  4. Step 4: Simplify right side
    819,621.40x = 847,956,039,646.56
  5. Step 5: Solve for x
    x = 847,956,039,646.56/819,621.40
  6. Step 6: Final answer
    x = 1,034,570.40

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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.