Home / 687,533.85-1,031,355.92-261,273.89

Finding the Fourth Proportional to 687,533.85, 1,031,355.92 and 261,273.89

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Solution

The fourth proportional to 687,533.85, 1,031,355.92 and 261,273.89 is: 391,931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,533.85 : 1,031,355.92 = 261,273.89 : x
  2. Step 2: Convert to fraction form
    687,533.85/1,031,355.92 = 261,273.89/x
  3. Step 3: Cross multiply
    687,533.85x = 1,031,355.92 × 261,273.89
  4. Step 4: Simplify right side
    687,533.85x = 269,466,366,729.78
  5. Step 5: Solve for x
    x = 269,466,366,729.78/687,533.85
  6. Step 6: Final answer
    x = 391,931.78

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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.