Home / 398,427,568.20-549,830,777.80-222,226,920.72

Finding the Fourth Proportional to 398,427,568.20, 549,830,777.80 and 222,226,920.72

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Solution

The fourth proportional to 398,427,568.20, 549,830,777.80 and 222,226,920.72 is: 306,673,559.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,427,568.20 : 549,830,777.80 = 222,226,920.72 : x
  2. Step 2: Convert to fraction form
    398,427,568.20/549,830,777.80 = 222,226,920.72/x
  3. Step 3: Cross multiply
    398,427,568.20x = 549,830,777.80 × 222,226,920.72
  4. Step 4: Simplify right side
    398,427,568.20x = 122,187,200,667,576,528
  5. Step 5: Solve for x
    x = 122,187,200,667,576,528/398,427,568.20
  6. Step 6: Final answer
    x = 306,673,559.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.