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Finding the Fourth Proportional to 514.21, 709.51 and 304.54

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Solution

The fourth proportional to 514.21, 709.51 and 304.54 is: 420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.21 : 709.51 = 304.54 : x
  2. Step 2: Convert to fraction form
    514.21/709.51 = 304.54/x
  3. Step 3: Cross multiply
    514.21x = 709.51 × 304.54
  4. Step 4: Simplify right side
    514.21x = 216,074.30
  5. Step 5: Solve for x
    x = 216,074.30/514.21
  6. Step 6: Final answer
    x = 420.21

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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.