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Finding the Fourth Proportional to 4,998.39, 7,478.74 and 2,989.64

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Solution

The fourth proportional to 4,998.39, 7,478.74 and 2,989.64 is: 4,473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,998.39 : 7,478.74 = 2,989.64 : x
  2. Step 2: Convert to fraction form
    4,998.39/7,478.74 = 2,989.64/x
  3. Step 3: Cross multiply
    4,998.39x = 7,478.74 × 2,989.64
  4. Step 4: Simplify right side
    4,998.39x = 22,358,762.69
  5. Step 5: Solve for x
    x = 22,358,762.69/4,998.39
  6. Step 6: Final answer
    x = 4,473.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.