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Finding the Fourth Proportional to 641,859.69, 885,794.05 and 355,379.77

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Solution

The fourth proportional to 641,859.69, 885,794.05 and 355,379.77 is: 490,439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,859.69 : 885,794.05 = 355,379.77 : x
  2. Step 2: Convert to fraction form
    641,859.69/885,794.05 = 355,379.77/x
  3. Step 3: Cross multiply
    641,859.69x = 885,794.05 × 355,379.77
  4. Step 4: Simplify right side
    641,859.69x = 314,793,287,307.84
  5. Step 5: Solve for x
    x = 314,793,287,307.84/641,859.69
  6. Step 6: Final answer
    x = 490,439.41

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1.5x scale

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.