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Finding the Fourth Proportional to 520.02, 717.08 and 394.28

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Solution

The fourth proportional to 520.02, 717.08 and 394.28 is: 543.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.02 : 717.08 = 394.28 : x
  2. Step 2: Convert to fraction form
    520.02/717.08 = 394.28/x
  3. Step 3: Cross multiply
    520.02x = 717.08 × 394.28
  4. Step 4: Simplify right side
    520.02x = 282,730.30
  5. Step 5: Solve for x
    x = 282,730.30/520.02
  6. Step 6: Final answer
    x = 543.69

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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.