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Finding the Fourth Proportional to 968.30, 1,451.69 and 420.10

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Solution

The fourth proportional to 968.30, 1,451.69 and 420.10 is: 629.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.30 : 1,451.69 = 420.10 : x
  2. Step 2: Convert to fraction form
    968.30/1,451.69 = 420.10/x
  3. Step 3: Cross multiply
    968.30x = 1,451.69 × 420.10
  4. Step 4: Simplify right side
    968.30x = 609,858.98
  5. Step 5: Solve for x
    x = 609,858.98/968.30
  6. Step 6: Final answer
    x = 629.82

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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.