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Finding the Fourth Proportional to 643,058.80, 887,377.89 and 356,568.28

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Solution

The fourth proportional to 643,058.80, 887,377.89 and 356,568.28 is: 492,040.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,058.80 : 887,377.89 = 356,568.28 : x
  2. Step 2: Convert to fraction form
    643,058.80/887,377.89 = 356,568.28/x
  3. Step 3: Cross multiply
    643,058.80x = 887,377.89 × 356,568.28
  4. Step 4: Simplify right side
    643,058.80x = 316,410,807,947.33
  5. Step 5: Solve for x
    x = 316,410,807,947.33/643,058.80
  6. Step 6: Final answer
    x = 492,040.24

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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.