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Finding the Fourth Proportional to 926.52, 1,278.55 and 506.87

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Solution

The fourth proportional to 926.52, 1,278.55 and 506.87 is: 699.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.52 : 1,278.55 = 506.87 : x
  2. Step 2: Convert to fraction form
    926.52/1,278.55 = 506.87/x
  3. Step 3: Cross multiply
    926.52x = 1,278.55 × 506.87
  4. Step 4: Simplify right side
    926.52x = 648,058.64
  5. Step 5: Solve for x
    x = 648,058.64/926.52
  6. Step 6: Final answer
    x = 699.45

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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.