Home / 687,713.40-1,031,715.90-207,901.80

Finding the Fourth Proportional to 687,713.40, 1,031,715.90 and 207,901.80

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Solution

The fourth proportional to 687,713.40, 1,031,715.90 and 207,901.80 is: 311,896.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,713.40 : 1,031,715.90 = 207,901.80 : x
  2. Step 2: Convert to fraction form
    687,713.40/1,031,715.90 = 207,901.80/x
  3. Step 3: Cross multiply
    687,713.40x = 1,031,715.90 × 207,901.80
  4. Step 4: Simplify right side
    687,713.40x = 214,495,592,698.62
  5. Step 5: Solve for x
    x = 214,495,592,698.62/687,713.40
  6. Step 6: Final answer
    x = 311,896.78

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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.