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Finding the Fourth Proportional to 1,614.34, 2,421.54 and 627.21

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Solution

The fourth proportional to 1,614.34, 2,421.54 and 627.21 is: 940.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,614.34 : 2,421.54 = 627.21 : x
  2. Step 2: Convert to fraction form
    1,614.34/2,421.54 = 627.21/x
  3. Step 3: Cross multiply
    1,614.34x = 2,421.54 × 627.21
  4. Step 4: Simplify right side
    1,614.34x = 1,518,822.56
  5. Step 5: Solve for x
    x = 1,518,822.56/1,614.34
  6. Step 6: Final answer
    x = 940.83

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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.