Home / 643,109.80-887,418.18-356,557.48

Finding the Fourth Proportional to 643,109.80, 887,418.18 and 356,557.48

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Solution

The fourth proportional to 643,109.80, 887,418.18 and 356,557.48 is: 492,008.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,109.80 : 887,418.18 = 356,557.48 : x
  2. Step 2: Convert to fraction form
    643,109.80/887,418.18 = 356,557.48/x
  3. Step 3: Cross multiply
    643,109.80x = 887,418.18 × 356,557.48
  4. Step 4: Simplify right side
    643,109.80x = 316,415,589,966.99
  5. Step 5: Solve for x
    x = 316,415,589,966.99/643,109.80
  6. Step 6: Final answer
    x = 492,008.66

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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.