Home / 687,807.40-1,031,856.90-207,995.80

Finding the Fourth Proportional to 687,807.40, 1,031,856.90 and 207,995.80

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Solution

The fourth proportional to 687,807.40, 1,031,856.90 and 207,995.80 is: 312,037.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,807.40 : 1,031,856.90 = 207,995.80 : x
  2. Step 2: Convert to fraction form
    687,807.40/1,031,856.90 = 207,995.80/x
  3. Step 3: Cross multiply
    687,807.40x = 1,031,856.90 × 207,995.80
  4. Step 4: Simplify right side
    687,807.40x = 214,621,901,401.02
  5. Step 5: Solve for x
    x = 214,621,901,401.02/687,807.40
  6. Step 6: Final answer
    x = 312,037.79

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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.