Home / 820,870.80-1,231,306.20-742,138.80

Finding the Fourth Proportional to 820,870.80, 1,231,306.20 and 742,138.80

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Solution

The fourth proportional to 820,870.80, 1,231,306.20 and 742,138.80 is: 1,113,208.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,870.80 : 1,231,306.20 = 742,138.80 : x
  2. Step 2: Convert to fraction form
    820,870.80/1,231,306.20 = 742,138.80/x
  3. Step 3: Cross multiply
    820,870.80x = 1,231,306.20 × 742,138.80
  4. Step 4: Simplify right side
    820,870.80x = 913,800,105,700.56
  5. Step 5: Solve for x
    x = 913,800,105,700.56/820,870.80
  6. Step 6: Final answer
    x = 1,113,208.20

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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.