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Finding the Fourth Proportional to 387.04, 579.76 and 240.80

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Solution

The fourth proportional to 387.04, 579.76 and 240.80 is: 360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.04 : 579.76 = 240.80 : x
  2. Step 2: Convert to fraction form
    387.04/579.76 = 240.80/x
  3. Step 3: Cross multiply
    387.04x = 579.76 × 240.80
  4. Step 4: Simplify right side
    387.04x = 139,606.21
  5. Step 5: Solve for x
    x = 139,606.21/387.04
  6. Step 6: Final answer
    x = 360.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.