Home / 661,997.41-991,743.35-391,315.15

Finding the Fourth Proportional to 661,997.41, 991,743.35 and 391,315.15

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Solution

The fourth proportional to 661,997.41, 991,743.35 and 391,315.15 is: 586,232.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,997.41 : 991,743.35 = 391,315.15 : x
  2. Step 2: Convert to fraction form
    661,997.41/991,743.35 = 391,315.15/x
  3. Step 3: Cross multiply
    661,997.41x = 991,743.35 × 391,315.15
  4. Step 4: Simplify right side
    661,997.41x = 388,084,197,049.86
  5. Step 5: Solve for x
    x = 388,084,197,049.86/661,997.41
  6. Step 6: Final answer
    x = 586,232.20

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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.