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Finding the Fourth Proportional to 580,439.40, 871,315.20 and 447,907.20

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Solution

The fourth proportional to 580,439.40, 871,315.20 and 447,907.20 is: 672,367.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,439.40 : 871,315.20 = 447,907.20 : x
  2. Step 2: Convert to fraction form
    580,439.40/871,315.20 = 447,907.20/x
  3. Step 3: Cross multiply
    580,439.40x = 871,315.20 × 447,907.20
  4. Step 4: Simplify right side
    580,439.40x = 390,268,351,549.44
  5. Step 5: Solve for x
    x = 390,268,351,549.44/580,439.40
  6. Step 6: Final answer
    x = 672,367.09

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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.