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Finding the Fourth Proportional to 578.43, 797.76 and 357.17

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Solution

The fourth proportional to 578.43, 797.76 and 357.17 is: 492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.43 : 797.76 = 357.17 : x
  2. Step 2: Convert to fraction form
    578.43/797.76 = 357.17/x
  3. Step 3: Cross multiply
    578.43x = 797.76 × 357.17
  4. Step 4: Simplify right side
    578.43x = 284,931.95
  5. Step 5: Solve for x
    x = 284,931.95/578.43
  6. Step 6: Final answer
    x = 492.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.