Home / 643,238.31-887,646.20-356,785.05

Finding the Fourth Proportional to 643,238.31, 887,646.20 and 356,785.05

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Solution

The fourth proportional to 643,238.31, 887,646.20 and 356,785.05 is: 492,350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,238.31 : 887,646.20 = 356,785.05 : x
  2. Step 2: Convert to fraction form
    643,238.31/887,646.20 = 356,785.05/x
  3. Step 3: Cross multiply
    643,238.31x = 887,646.20 × 356,785.05
  4. Step 4: Simplify right side
    643,238.31x = 316,698,895,394.06
  5. Step 5: Solve for x
    x = 316,698,895,394.06/643,238.31
  6. Step 6: Final answer
    x = 492,350.80

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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.