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Finding the Fourth Proportional to 387.48, 531.33 and 373.71

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Solution

The fourth proportional to 387.48, 531.33 and 373.71 is: 512.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.48 : 531.33 = 373.71 : x
  2. Step 2: Convert to fraction form
    387.48/531.33 = 373.71/x
  3. Step 3: Cross multiply
    387.48x = 531.33 × 373.71
  4. Step 4: Simplify right side
    387.48x = 198,563.33
  5. Step 5: Solve for x
    x = 198,563.33/387.48
  6. Step 6: Final answer
    x = 512.45

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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.