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Finding the Fourth Proportional to 518.01, 715.55 and 493.71

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Solution

The fourth proportional to 518.01, 715.55 and 493.71 is: 681.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.01 : 715.55 = 493.71 : x
  2. Step 2: Convert to fraction form
    518.01/715.55 = 493.71/x
  3. Step 3: Cross multiply
    518.01x = 715.55 × 493.71
  4. Step 4: Simplify right side
    518.01x = 353,274.19
  5. Step 5: Solve for x
    x = 353,274.19/518.01
  6. Step 6: Final answer
    x = 681.98

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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.