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Finding the Fourth Proportional to 1,009.22, 1,513.35 and 424.09

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Solution

The fourth proportional to 1,009.22, 1,513.35 and 424.09 is: 635.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.22 : 1,513.35 = 424.09 : x
  2. Step 2: Convert to fraction form
    1,009.22/1,513.35 = 424.09/x
  3. Step 3: Cross multiply
    1,009.22x = 1,513.35 × 424.09
  4. Step 4: Simplify right side
    1,009.22x = 641,798.49
  5. Step 5: Solve for x
    x = 641,798.49/1,009.22
  6. Step 6: Final answer
    x = 635.94

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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.