Home / 643,458.18-887,942.69-353,063.37

Finding the Fourth Proportional to 643,458.18, 887,942.69 and 353,063.37

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Solution

The fourth proportional to 643,458.18, 887,942.69 and 353,063.37 is: 487,211.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,458.18 : 887,942.69 = 353,063.37 : x
  2. Step 2: Convert to fraction form
    643,458.18/887,942.69 = 353,063.37/x
  3. Step 3: Cross multiply
    643,458.18x = 887,942.69 × 353,063.37
  4. Step 4: Simplify right side
    643,458.18x = 313,500,036,732.95
  5. Step 5: Solve for x
    x = 313,500,036,732.95/643,458.18
  6. Step 6: Final answer
    x = 487,211.21

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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.