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Finding the Fourth Proportional to 1,633.98, 2,449.28 and 646.40

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Solution

The fourth proportional to 1,633.98, 2,449.28 and 646.40 is: 968.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,633.98 : 2,449.28 = 646.40 : x
  2. Step 2: Convert to fraction form
    1,633.98/2,449.28 = 646.40/x
  3. Step 3: Cross multiply
    1,633.98x = 2,449.28 × 646.40
  4. Step 4: Simplify right side
    1,633.98x = 1,583,203.96
  5. Step 5: Solve for x
    x = 1,583,203.96/1,633.98
  6. Step 6: Final answer
    x = 968.92

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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.