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Finding the Fourth Proportional to 641,955.86, 885,898.54 and 355,475.94

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Solution

The fourth proportional to 641,955.86, 885,898.54 and 355,475.94 is: 490,556.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,955.86 : 885,898.54 = 355,475.94 : x
  2. Step 2: Convert to fraction form
    641,955.86/885,898.54 = 355,475.94/x
  3. Step 3: Cross multiply
    641,955.86x = 885,898.54 × 355,475.94
  4. Step 4: Simplify right side
    641,955.86x = 314,915,616,251.13
  5. Step 5: Solve for x
    x = 314,915,616,251.13/641,955.86
  6. Step 6: Final answer
    x = 490,556.49

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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.