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Finding the Fourth Proportional to 926.29, 1,278.69 and 590.64

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Solution

The fourth proportional to 926.29, 1,278.69 and 590.64 is: 815.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.29 : 1,278.69 = 590.64 : x
  2. Step 2: Convert to fraction form
    926.29/1,278.69 = 590.64/x
  3. Step 3: Cross multiply
    926.29x = 1,278.69 × 590.64
  4. Step 4: Simplify right side
    926.29x = 755,244.94
  5. Step 5: Solve for x
    x = 755,244.94/926.29
  6. Step 6: Final answer
    x = 815.35

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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.