Home / 687,419.10-1,031,274.45-207,664.20

Finding the Fourth Proportional to 687,419.10, 1,031,274.45 and 207,664.20

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Solution

The fourth proportional to 687,419.10, 1,031,274.45 and 207,664.20 is: 311,540.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,419.10 : 1,031,274.45 = 207,664.20 : x
  2. Step 2: Convert to fraction form
    687,419.10/1,031,274.45 = 207,664.20/x
  3. Step 3: Cross multiply
    687,419.10x = 1,031,274.45 × 207,664.20
  4. Step 4: Simplify right side
    687,419.10x = 214,158,783,639.69
  5. Step 5: Solve for x
    x = 214,158,783,639.69/687,419.10
  6. Step 6: Final answer
    x = 311,540.35

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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.