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Finding the Fourth Proportional to 3,209.06, 4,812.33 and 987.23

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Solution

The fourth proportional to 3,209.06, 4,812.33 and 987.23 is: 1,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209.06 : 4,812.33 = 987.23 : x
  2. Step 2: Convert to fraction form
    3,209.06/4,812.33 = 987.23/x
  3. Step 3: Cross multiply
    3,209.06x = 4,812.33 × 987.23
  4. Step 4: Simplify right side
    3,209.06x = 4,750,852.48
  5. Step 5: Solve for x
    x = 4,750,852.48/3,209.06
  6. Step 6: Final answer
    x = 1,480.45

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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.