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Finding the Fourth Proportional to 582.74, 874.10 and 388.13

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Solution

The fourth proportional to 582.74, 874.10 and 388.13 is: 582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.74 : 874.10 = 388.13 : x
  2. Step 2: Convert to fraction form
    582.74/874.10 = 388.13/x
  3. Step 3: Cross multiply
    582.74x = 874.10 × 388.13
  4. Step 4: Simplify right side
    582.74x = 339,258.12
  5. Step 5: Solve for x
    x = 339,258.12/582.74
  6. Step 6: Final answer
    x = 582.18

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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.