Home / 687,456.70-1,031,183.22-387,801.25

Finding the Fourth Proportional to 687,456.70, 1,031,183.22 and 387,801.25

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Solution

The fourth proportional to 687,456.70, 1,031,183.22 and 387,801.25 is: 581,700.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,456.70 : 1,031,183.22 = 387,801.25 : x
  2. Step 2: Convert to fraction form
    687,456.70/1,031,183.22 = 387,801.25/x
  3. Step 3: Cross multiply
    687,456.70x = 1,031,183.22 × 387,801.25
  4. Step 4: Simplify right side
    687,456.70x = 399,894,141,695.03
  5. Step 5: Solve for x
    x = 399,894,141,695.03/687,456.70
  6. Step 6: Final answer
    x = 581,700.84

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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.