Home / 869,086.89-1,304,004.02-420,145.34

Finding the Fourth Proportional to 869,086.89, 1,304,004.02 and 420,145.34

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Solution

The fourth proportional to 869,086.89, 1,304,004.02 and 420,145.34 is: 630,398.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,086.89 : 1,304,004.02 = 420,145.34 : x
  2. Step 2: Convert to fraction form
    869,086.89/1,304,004.02 = 420,145.34/x
  3. Step 3: Cross multiply
    869,086.89x = 1,304,004.02 × 420,145.34
  4. Step 4: Simplify right side
    869,086.89x = 547,871,203,723.52
  5. Step 5: Solve for x
    x = 547,871,203,723.52/869,086.89
  6. Step 6: Final answer
    x = 630,398.65

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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.