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Finding the Fourth Proportional to 1,513.21, 2,269.72 and 417.58

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Solution

The fourth proportional to 1,513.21, 2,269.72 and 417.58 is: 626.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.21 : 2,269.72 = 417.58 : x
  2. Step 2: Convert to fraction form
    1,513.21/2,269.72 = 417.58/x
  3. Step 3: Cross multiply
    1,513.21x = 2,269.72 × 417.58
  4. Step 4: Simplify right side
    1,513.21x = 947,789.68
  5. Step 5: Solve for x
    x = 947,789.68/1,513.21
  6. Step 6: Final answer
    x = 626.34

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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.