Home / 687,986.40-1,031,979.60-314,738.40

Finding the Fourth Proportional to 687,986.40, 1,031,979.60 and 314,738.40

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Solution

The fourth proportional to 687,986.40, 1,031,979.60 and 314,738.40 is: 472,107.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,986.40 : 1,031,979.60 = 314,738.40 : x
  2. Step 2: Convert to fraction form
    687,986.40/1,031,979.60 = 314,738.40/x
  3. Step 3: Cross multiply
    687,986.40x = 1,031,979.60 × 314,738.40
  4. Step 4: Simplify right side
    687,986.40x = 324,803,608,136.64
  5. Step 5: Solve for x
    x = 324,803,608,136.64/687,986.40
  6. Step 6: Final answer
    x = 472,107.60

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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.