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Finding the Fourth Proportional to 571.52, 787.98 and 374.72

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Solution

The fourth proportional to 571.52, 787.98 and 374.72 is: 516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.52 : 787.98 = 374.72 : x
  2. Step 2: Convert to fraction form
    571.52/787.98 = 374.72/x
  3. Step 3: Cross multiply
    571.52x = 787.98 × 374.72
  4. Step 4: Simplify right side
    571.52x = 295,271.87
  5. Step 5: Solve for x
    x = 295,271.87/571.52
  6. Step 6: Final answer
    x = 516.64

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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.