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Finding the Fourth Proportional to 3,329.15, 4,992.19 and 988.31

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Solution

The fourth proportional to 3,329.15, 4,992.19 and 988.31 is: 1,482.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,329.15 : 4,992.19 = 988.31 : x
  2. Step 2: Convert to fraction form
    3,329.15/4,992.19 = 988.31/x
  3. Step 3: Cross multiply
    3,329.15x = 4,992.19 × 988.31
  4. Step 4: Simplify right side
    3,329.15x = 4,933,831.30
  5. Step 5: Solve for x
    x = 4,933,831.30/3,329.15
  6. Step 6: Final answer
    x = 1,482.01

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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.