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Finding the Fourth Proportional to 387,879.66, 534,970.30 and 265,444.56

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Solution

The fourth proportional to 387,879.66, 534,970.30 and 265,444.56 is: 366,105.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,879.66 : 534,970.30 = 265,444.56 : x
  2. Step 2: Convert to fraction form
    387,879.66/534,970.30 = 265,444.56/x
  3. Step 3: Cross multiply
    387,879.66x = 534,970.30 × 265,444.56
  4. Step 4: Simplify right side
    387,879.66x = 142,004,955,896.57
  5. Step 5: Solve for x
    x = 142,004,955,896.57/387,879.66
  6. Step 6: Final answer
    x = 366,105.70

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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.