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Finding the Fourth Proportional to 518.00, 715.67 and 487.15

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Solution

The fourth proportional to 518.00, 715.67 and 487.15 is: 673.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.00 : 715.67 = 487.15 : x
  2. Step 2: Convert to fraction form
    518.00/715.67 = 487.15/x
  3. Step 3: Cross multiply
    518.00x = 715.67 × 487.15
  4. Step 4: Simplify right side
    518.00x = 348,636.24
  5. Step 5: Solve for x
    x = 348,636.24/518.00
  6. Step 6: Final answer
    x = 673.05

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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.