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Finding the Fourth Proportional to 290,373.09, 399,787.97 and 247,760.61

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Solution

The fourth proportional to 290,373.09, 399,787.97 and 247,760.61 is: 341,118.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,373.09 : 399,787.97 = 247,760.61 : x
  2. Step 2: Convert to fraction form
    290,373.09/399,787.97 = 247,760.61/x
  3. Step 3: Cross multiply
    290,373.09x = 399,787.97 × 247,760.61
  4. Step 4: Simplify right side
    290,373.09x = 99,051,710,079.06
  5. Step 5: Solve for x
    x = 99,051,710,079.06/290,373.09
  6. Step 6: Final answer
    x = 341,118.77

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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.