Home / 687,789.42-1,031,889.15-328,230.21

Finding the Fourth Proportional to 687,789.42, 1,031,889.15 and 328,230.21

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Solution

The fourth proportional to 687,789.42, 1,031,889.15 and 328,230.21 is: 492,443.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,789.42 : 1,031,889.15 = 328,230.21 : x
  2. Step 2: Convert to fraction form
    687,789.42/1,031,889.15 = 328,230.21/x
  3. Step 3: Cross multiply
    687,789.42x = 1,031,889.15 × 328,230.21
  4. Step 4: Simplify right side
    687,789.42x = 338,697,192,401.22
  5. Step 5: Solve for x
    x = 338,697,192,401.22/687,789.42
  6. Step 6: Final answer
    x = 492,443.16

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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.