Home / 643,083.27-887,490.35-356,597.20

Finding the Fourth Proportional to 643,083.27, 887,490.35 and 356,597.20

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Solution

The fourth proportional to 643,083.27, 887,490.35 and 356,597.20 is: 492,123.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,083.27 : 887,490.35 = 356,597.20 : x
  2. Step 2: Convert to fraction form
    643,083.27/887,490.35 = 356,597.20/x
  3. Step 3: Cross multiply
    643,083.27x = 887,490.35 × 356,597.20
  4. Step 4: Simplify right side
    643,083.27x = 316,476,573,837.02
  5. Step 5: Solve for x
    x = 316,476,573,837.02/643,083.27
  6. Step 6: Final answer
    x = 492,123.79

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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.