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Finding the Fourth Proportional to 228,481, 315,303.78 and 127,879.72

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Solution

The fourth proportional to 228,481, 315,303.78 and 127,879.72 is: 176,474.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,481 : 315,303.78 = 127,879.72 : x
  2. Step 2: Convert to fraction form
    228,481/315,303.78 = 127,879.72/x
  3. Step 3: Cross multiply
    228,481x = 315,303.78 × 127,879.72
  4. Step 4: Simplify right side
    228,481x = 40,320,959,101.34
  5. Step 5: Solve for x
    x = 40,320,959,101.34/228,481
  6. Step 6: Final answer
    x = 176,474.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.