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Finding the Fourth Proportional to 340,679.70, 511,019.55 and 280,545.30

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Solution

The fourth proportional to 340,679.70, 511,019.55 and 280,545.30 is: 420,817.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,679.70 : 511,019.55 = 280,545.30 : x
  2. Step 2: Convert to fraction form
    340,679.70/511,019.55 = 280,545.30/x
  3. Step 3: Cross multiply
    340,679.70x = 511,019.55 × 280,545.30
  4. Step 4: Simplify right side
    340,679.70x = 143,364,132,960.62
  5. Step 5: Solve for x
    x = 143,364,132,960.62/340,679.70
  6. Step 6: Final answer
    x = 420,817.95

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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.