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Finding the Fourth Proportional to 447,712.76, 671,120.40 and 207,995.12

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Solution

The fourth proportional to 447,712.76, 671,120.40 and 207,995.12 is: 311,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,712.76 : 671,120.40 = 207,995.12 : x
  2. Step 2: Convert to fraction form
    447,712.76/671,120.40 = 207,995.12/x
  3. Step 3: Cross multiply
    447,712.76x = 671,120.40 × 207,995.12
  4. Step 4: Simplify right side
    447,712.76x = 139,589,768,132.45
  5. Step 5: Solve for x
    x = 139,589,768,132.45/447,712.76
  6. Step 6: Final answer
    x = 311,784.21

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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.