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Finding the Fourth Proportional to 3,488.39, 5,232.16 and 989.63

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Solution

The fourth proportional to 3,488.39, 5,232.16 and 989.63 is: 1,484.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,488.39 : 5,232.16 = 989.63 : x
  2. Step 2: Convert to fraction form
    3,488.39/5,232.16 = 989.63/x
  3. Step 3: Cross multiply
    3,488.39x = 5,232.16 × 989.63
  4. Step 4: Simplify right side
    3,488.39x = 5,177,902.50
  5. Step 5: Solve for x
    x = 5,177,902.50/3,488.39
  6. Step 6: Final answer
    x = 1,484.32

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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.