Home / 687,724.40-1,031,732.40-207,912.80

Finding the Fourth Proportional to 687,724.40, 1,031,732.40 and 207,912.80

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Solution

The fourth proportional to 687,724.40, 1,031,732.40 and 207,912.80 is: 311,913.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,724.40 : 1,031,732.40 = 207,912.80 : x
  2. Step 2: Convert to fraction form
    687,724.40/1,031,732.40 = 207,912.80/x
  3. Step 3: Cross multiply
    687,724.40x = 1,031,732.40 × 207,912.80
  4. Step 4: Simplify right side
    687,724.40x = 214,510,372,134.72
  5. Step 5: Solve for x
    x = 214,510,372,134.72/687,724.40
  6. Step 6: Final answer
    x = 311,913.28

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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.