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Finding the Fourth Proportional to 498.03, 686.47 and 392.94

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Solution

The fourth proportional to 498.03, 686.47 and 392.94 is: 541.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.03 : 686.47 = 392.94 : x
  2. Step 2: Convert to fraction form
    498.03/686.47 = 392.94/x
  3. Step 3: Cross multiply
    498.03x = 686.47 × 392.94
  4. Step 4: Simplify right side
    498.03x = 269,741.52
  5. Step 5: Solve for x
    x = 269,741.52/498.03
  6. Step 6: Final answer
    x = 541.62

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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.