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Finding the Fourth Proportional to 6,398,829.89, 8,830,416.39 and 3,498,220.76

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Solution

The fourth proportional to 6,398,829.89, 8,830,416.39 and 3,498,220.76 is: 4,827,561.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,398,829.89 : 8,830,416.39 = 3,498,220.76 : x
  2. Step 2: Convert to fraction form
    6,398,829.89/8,830,416.39 = 3,498,220.76/x
  3. Step 3: Cross multiply
    6,398,829.89x = 8,830,416.39 × 3,498,220.76
  4. Step 4: Simplify right side
    6,398,829.89x = 30,890,745,955,149.54
  5. Step 5: Solve for x
    x = 30,890,745,955,149.54/6,398,829.89
  6. Step 6: Final answer
    x = 4,827,561.68

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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.