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Finding the Fourth Proportional to 387.52, 579.23 and 319.18

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Solution

The fourth proportional to 387.52, 579.23 and 319.18 is: 477.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.52 : 579.23 = 319.18 : x
  2. Step 2: Convert to fraction form
    387.52/579.23 = 319.18/x
  3. Step 3: Cross multiply
    387.52x = 579.23 × 319.18
  4. Step 4: Simplify right side
    387.52x = 184,878.63
  5. Step 5: Solve for x
    x = 184,878.63/387.52
  6. Step 6: Final answer
    x = 477.08

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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.