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Finding the Fourth Proportional to 353,448.64, 487,939.84 and 272,694.72

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Solution

The fourth proportional to 353,448.64, 487,939.84 and 272,694.72 is: 376,458.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,448.64 : 487,939.84 = 272,694.72 : x
  2. Step 2: Convert to fraction form
    353,448.64/487,939.84 = 272,694.72/x
  3. Step 3: Cross multiply
    353,448.64x = 487,939.84 × 272,694.72
  4. Step 4: Simplify right side
    353,448.64x = 133,058,618,045.65
  5. Step 5: Solve for x
    x = 133,058,618,045.65/353,448.64
  6. Step 6: Final answer
    x = 376,458.14

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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.