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Finding the Fourth Proportional to 641,954.48, 885,886.32 and 355,468.40

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Solution

The fourth proportional to 641,954.48, 885,886.32 and 355,468.40 is: 490,540.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,954.48 : 885,886.32 = 355,468.40 : x
  2. Step 2: Convert to fraction form
    641,954.48/885,886.32 = 355,468.40/x
  3. Step 3: Cross multiply
    641,954.48x = 885,886.32 × 355,468.40
  4. Step 4: Simplify right side
    641,954.48x = 314,904,592,752.29
  5. Step 5: Solve for x
    x = 314,904,592,752.29/641,954.48
  6. Step 6: Final answer
    x = 490,540.38

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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.