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Finding the Fourth Proportional to 582.86, 874.08 and 387.74

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Solution

The fourth proportional to 582.86, 874.08 and 387.74 is: 581.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.86 : 874.08 = 387.74 : x
  2. Step 2: Convert to fraction form
    582.86/874.08 = 387.74/x
  3. Step 3: Cross multiply
    582.86x = 874.08 × 387.74
  4. Step 4: Simplify right side
    582.86x = 338,915.78
  5. Step 5: Solve for x
    x = 338,915.78/582.86
  6. Step 6: Final answer
    x = 581.47

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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.