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Finding the Fourth Proportional to 387.37, 530.71 and 372.79

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Solution

The fourth proportional to 387.37, 530.71 and 372.79 is: 510.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.37 : 530.71 = 372.79 : x
  2. Step 2: Convert to fraction form
    387.37/530.71 = 372.79/x
  3. Step 3: Cross multiply
    387.37x = 530.71 × 372.79
  4. Step 4: Simplify right side
    387.37x = 197,843.38
  5. Step 5: Solve for x
    x = 197,843.38/387.37
  6. Step 6: Final answer
    x = 510.73

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.