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Finding the Fourth Proportional to 2,008.71, 3,011.99 and 621.45

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Solution

The fourth proportional to 2,008.71, 3,011.99 and 621.45 is: 931.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,008.71 : 3,011.99 = 621.45 : x
  2. Step 2: Convert to fraction form
    2,008.71/3,011.99 = 621.45/x
  3. Step 3: Cross multiply
    2,008.71x = 3,011.99 × 621.45
  4. Step 4: Simplify right side
    2,008.71x = 1,871,801.19
  5. Step 5: Solve for x
    x = 1,871,801.19/2,008.71
  6. Step 6: Final answer
    x = 931.84

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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.