Home / 1,281,132.08-1,921,777.24-428,280.38

Finding the Fourth Proportional to 1,281,132.08, 1,921,777.24 and 428,280.38

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Solution

The fourth proportional to 1,281,132.08, 1,921,777.24 and 428,280.38 is: 642,447.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,132.08 : 1,921,777.24 = 428,280.38 : x
  2. Step 2: Convert to fraction form
    1,281,132.08/1,921,777.24 = 428,280.38/x
  3. Step 3: Cross multiply
    1,281,132.08x = 1,921,777.24 × 428,280.38
  4. Step 4: Simplify right side
    1,281,132.08x = 823,059,486,622.55
  5. Step 5: Solve for x
    x = 823,059,486,622.55/1,281,132.08
  6. Step 6: Final answer
    x = 642,447.02

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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.