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Finding the Fourth Proportional to 641,565.90, 885,300.96 and 383,391.62

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Solution

The fourth proportional to 641,565.90, 885,300.96 and 383,391.62 is: 529,044.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,565.90 : 885,300.96 = 383,391.62 : x
  2. Step 2: Convert to fraction form
    641,565.90/885,300.96 = 383,391.62/x
  3. Step 3: Cross multiply
    641,565.90x = 885,300.96 × 383,391.62
  4. Step 4: Simplify right side
    641,565.90x = 339,416,964,815.45
  5. Step 5: Solve for x
    x = 339,416,964,815.45/641,565.90
  6. Step 6: Final answer
    x = 529,044.58

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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.