Home / 687,790.90-1,031,832.15-207,979.30

Finding the Fourth Proportional to 687,790.90, 1,031,832.15 and 207,979.30

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Solution

The fourth proportional to 687,790.90, 1,031,832.15 and 207,979.30 is: 312,013.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,790.90 : 1,031,832.15 = 207,979.30 : x
  2. Step 2: Convert to fraction form
    687,790.90/1,031,832.15 = 207,979.30/x
  3. Step 3: Cross multiply
    687,790.90x = 1,031,832.15 × 207,979.30
  4. Step 4: Simplify right side
    687,790.90x = 214,599,728,274.50
  5. Step 5: Solve for x
    x = 214,599,728,274.50/687,790.90
  6. Step 6: Final answer
    x = 312,013.04

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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.