Home / 869,084.75-1,304,000.80-420,143.20

Finding the Fourth Proportional to 869,084.75, 1,304,000.80 and 420,143.20

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Solution

The fourth proportional to 869,084.75, 1,304,000.80 and 420,143.20 is: 630,395.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,084.75 : 1,304,000.80 = 420,143.20 : x
  2. Step 2: Convert to fraction form
    869,084.75/1,304,000.80 = 420,143.20/x
  3. Step 3: Cross multiply
    869,084.75x = 1,304,000.80 × 420,143.20
  4. Step 4: Simplify right side
    869,084.75x = 547,867,067,339.02
  5. Step 5: Solve for x
    x = 547,867,067,339.02/869,084.75
  6. Step 6: Final answer
    x = 630,395.44

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1.5x scale

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.