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Finding the Fourth Proportional to 265,561.29, 398,459.67 and 139,171.48

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Solution

The fourth proportional to 265,561.29, 398,459.67 and 139,171.48 is: 208,818.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,561.29 : 398,459.67 = 139,171.48 : x
  2. Step 2: Convert to fraction form
    265,561.29/398,459.67 = 139,171.48/x
  3. Step 3: Cross multiply
    265,561.29x = 398,459.67 × 139,171.48
  4. Step 4: Simplify right side
    265,561.29x = 55,454,221,994.21
  5. Step 5: Solve for x
    x = 55,454,221,994.21/265,561.29
  6. Step 6: Final answer
    x = 208,818.92

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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.