Home / 687,906.60-1,031,859.90-660,350.40

Finding the Fourth Proportional to 687,906.60, 1,031,859.90 and 660,350.40

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Solution

The fourth proportional to 687,906.60, 1,031,859.90 and 660,350.40 is: 990,525.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,906.60 : 1,031,859.90 = 660,350.40 : x
  2. Step 2: Convert to fraction form
    687,906.60/1,031,859.90 = 660,350.40/x
  3. Step 3: Cross multiply
    687,906.60x = 1,031,859.90 × 660,350.40
  4. Step 4: Simplify right side
    687,906.60x = 681,389,097,708.96
  5. Step 5: Solve for x
    x = 681,389,097,708.96/687,906.60
  6. Step 6: Final answer
    x = 990,525.60

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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.