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Finding the Fourth Proportional to 387.86, 579.02 and 375.03

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Solution

The fourth proportional to 387.86, 579.02 and 375.03 is: 559.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.86 : 579.02 = 375.03 : x
  2. Step 2: Convert to fraction form
    387.86/579.02 = 375.03/x
  3. Step 3: Cross multiply
    387.86x = 579.02 × 375.03
  4. Step 4: Simplify right side
    387.86x = 217,148.00
  5. Step 5: Solve for x
    x = 217,148.00/387.86
  6. Step 6: Final answer
    x = 559.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.