Home / 642,339.90-886,436.19-355,864.50

Finding the Fourth Proportional to 642,339.90, 886,436.19 and 355,864.50

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Solution

The fourth proportional to 642,339.90, 886,436.19 and 355,864.50 is: 491,096.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,339.90 : 886,436.19 = 355,864.50 : x
  2. Step 2: Convert to fraction form
    642,339.90/886,436.19 = 355,864.50/x
  3. Step 3: Cross multiply
    642,339.90x = 886,436.19 × 355,864.50
  4. Step 4: Simplify right side
    642,339.90x = 315,451,171,536.26
  5. Step 5: Solve for x
    x = 315,451,171,536.26/642,339.90
  6. Step 6: Final answer
    x = 491,096.96

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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.