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Finding the Fourth Proportional to 1,009.46, 1,392.96 and 567.28

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Solution

The fourth proportional to 1,009.46, 1,392.96 and 567.28 is: 782.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.46 : 1,392.96 = 567.28 : x
  2. Step 2: Convert to fraction form
    1,009.46/1,392.96 = 567.28/x
  3. Step 3: Cross multiply
    1,009.46x = 1,392.96 × 567.28
  4. Step 4: Simplify right side
    1,009.46x = 790,198.35
  5. Step 5: Solve for x
    x = 790,198.35/1,009.46
  6. Step 6: Final answer
    x = 782.79

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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.