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Finding the Fourth Proportional to 487,571.28, 672,852.66 and 272,731.34

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Solution

The fourth proportional to 487,571.28, 672,852.66 and 272,731.34 is: 376,371.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,571.28 : 672,852.66 = 272,731.34 : x
  2. Step 2: Convert to fraction form
    487,571.28/672,852.66 = 272,731.34/x
  3. Step 3: Cross multiply
    487,571.28x = 672,852.66 × 272,731.34
  4. Step 4: Simplify right side
    487,571.28x = 183,508,007,584.36
  5. Step 5: Solve for x
    x = 183,508,007,584.36/487,571.28
  6. Step 6: Final answer
    x = 376,371.65

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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.