Home / 687,789.80-1,031,732.10-288,028.07

Finding the Fourth Proportional to 687,789.80, 1,031,732.10 and 288,028.07

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Solution

The fourth proportional to 687,789.80, 1,031,732.10 and 288,028.07 is: 432,061.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,789.80 : 1,031,732.10 = 288,028.07 : x
  2. Step 2: Convert to fraction form
    687,789.80/1,031,732.10 = 288,028.07/x
  3. Step 3: Cross multiply
    687,789.80x = 1,031,732.10 × 288,028.07
  4. Step 4: Simplify right side
    687,789.80x = 297,167,798,921.25
  5. Step 5: Solve for x
    x = 297,167,798,921.25/687,789.80
  6. Step 6: Final answer
    x = 432,061.95

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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.