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Finding the Fourth Proportional to 926.66, 1,278.78 and 533.72

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Solution

The fourth proportional to 926.66, 1,278.78 and 533.72 is: 736.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.66 : 1,278.78 = 533.72 : x
  2. Step 2: Convert to fraction form
    926.66/1,278.78 = 533.72/x
  3. Step 3: Cross multiply
    926.66x = 1,278.78 × 533.72
  4. Step 4: Simplify right side
    926.66x = 682,510.46
  5. Step 5: Solve for x
    x = 682,510.46/926.66
  6. Step 6: Final answer
    x = 736.53

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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.