Home / 641,877.86-885,819.09-355,397.90

Finding the Fourth Proportional to 641,877.86, 885,819.09 and 355,397.90

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Solution

The fourth proportional to 641,877.86, 885,819.09 and 355,397.90 is: 490,464.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,877.86 : 885,819.09 = 355,397.90 : x
  2. Step 2: Convert to fraction form
    641,877.86/885,819.09 = 355,397.90/x
  3. Step 3: Cross multiply
    641,877.86x = 885,819.09 × 355,397.90
  4. Step 4: Simplify right side
    641,877.86x = 314,818,244,365.91
  5. Step 5: Solve for x
    x = 314,818,244,365.91/641,877.86
  6. Step 6: Final answer
    x = 490,464.41

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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.