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Finding the Fourth Proportional to 641,459.45, 885,208.91 and 354,995.26

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Solution

The fourth proportional to 641,459.45, 885,208.91 and 354,995.26 is: 489,890.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,459.45 : 885,208.91 = 354,995.26 : x
  2. Step 2: Convert to fraction form
    641,459.45/885,208.91 = 354,995.26/x
  3. Step 3: Cross multiply
    641,459.45x = 885,208.91 × 354,995.26
  4. Step 4: Simplify right side
    641,459.45x = 314,244,963,171.77
  5. Step 5: Solve for x
    x = 314,244,963,171.77/641,459.45
  6. Step 6: Final answer
    x = 489,890.61

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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.