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Finding the Fourth Proportional to 387.74, 579.07 and 348.86

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Solution

The fourth proportional to 387.74, 579.07 and 348.86 is: 521.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.74 : 579.07 = 348.86 : x
  2. Step 2: Convert to fraction form
    387.74/579.07 = 348.86/x
  3. Step 3: Cross multiply
    387.74x = 579.07 × 348.86
  4. Step 4: Simplify right side
    387.74x = 202,014.36
  5. Step 5: Solve for x
    x = 202,014.36/387.74
  6. Step 6: Final answer
    x = 521.00

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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.