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Finding the Fourth Proportional to 641,154.77, 884,794.21 and 354,694.22

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Solution

The fourth proportional to 641,154.77, 884,794.21 and 354,694.22 is: 489,478.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,154.77 : 884,794.21 = 354,694.22 : x
  2. Step 2: Convert to fraction form
    641,154.77/884,794.21 = 354,694.22/x
  3. Step 3: Cross multiply
    641,154.77x = 884,794.21 × 354,694.22
  4. Step 4: Simplify right side
    641,154.77x = 313,831,387,752.50
  5. Step 5: Solve for x
    x = 313,831,387,752.50/641,154.77
  6. Step 6: Final answer
    x = 489,478.37

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Double scale
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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.