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Finding the Fourth Proportional to 265,815, 398,839.95 and 139,425.03

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Solution

The fourth proportional to 265,815, 398,839.95 and 139,425.03 is: 209,199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,815 : 398,839.95 = 139,425.03 : x
  2. Step 2: Convert to fraction form
    265,815/398,839.95 = 139,425.03/x
  3. Step 3: Cross multiply
    265,815x = 398,839.95 × 139,425.03
  4. Step 4: Simplify right side
    265,815x = 55,608,271,993.95
  5. Step 5: Solve for x
    x = 55,608,271,993.95/265,815
  6. Step 6: Final answer
    x = 209,199.15

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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.