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Finding the Fourth Proportional to 2,989.99, 4,126.58 and 1,811.08

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Solution

The fourth proportional to 2,989.99, 4,126.58 and 1,811.08 is: 2,499.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.99 : 4,126.58 = 1,811.08 : x
  2. Step 2: Convert to fraction form
    2,989.99/4,126.58 = 1,811.08/x
  3. Step 3: Cross multiply
    2,989.99x = 4,126.58 × 1,811.08
  4. Step 4: Simplify right side
    2,989.99x = 7,473,566.51
  5. Step 5: Solve for x
    x = 7,473,566.51/2,989.99
  6. Step 6: Final answer
    x = 2,499.53

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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.