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Finding the Fourth Proportional to 265,475.86, 398,003.28 and 139,091.86

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Solution

The fourth proportional to 265,475.86, 398,003.28 and 139,091.86 is: 208,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,475.86 : 398,003.28 = 139,091.86 : x
  2. Step 2: Convert to fraction form
    265,475.86/398,003.28 = 139,091.86/x
  3. Step 3: Cross multiply
    265,475.86x = 398,003.28 × 139,091.86
  4. Step 4: Simplify right side
    265,475.86x = 55,359,016,501.30
  5. Step 5: Solve for x
    x = 55,359,016,501.30/265,475.86
  6. Step 6: Final answer
    x = 208,527.50

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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.