Home / 687,575.40-1,031,508.90-207,763.80

Finding the Fourth Proportional to 687,575.40, 1,031,508.90 and 207,763.80

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Solution

The fourth proportional to 687,575.40, 1,031,508.90 and 207,763.80 is: 311,689.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,575.40 : 1,031,508.90 = 207,763.80 : x
  2. Step 2: Convert to fraction form
    687,575.40/1,031,508.90 = 207,763.80/x
  3. Step 3: Cross multiply
    687,575.40x = 1,031,508.90 × 207,763.80
  4. Step 4: Simplify right side
    687,575.40x = 214,310,208,797.82
  5. Step 5: Solve for x
    x = 214,310,208,797.82/687,575.40
  6. Step 6: Final answer
    x = 311,689.76

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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.