Home / 643,112.10-887,436.54-356,631.30

Finding the Fourth Proportional to 643,112.10, 887,436.54 and 356,631.30

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Solution

The fourth proportional to 643,112.10, 887,436.54 and 356,631.30 is: 492,118.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,112.10 : 887,436.54 = 356,631.30 : x
  2. Step 2: Convert to fraction form
    643,112.10/887,436.54 = 356,631.30/x
  3. Step 3: Cross multiply
    643,112.10x = 887,436.54 × 356,631.30
  4. Step 4: Simplify right side
    643,112.10x = 316,487,646,927.70
  5. Step 5: Solve for x
    x = 316,487,646,927.70/643,112.10
  6. Step 6: Final answer
    x = 492,118.94

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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.