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Finding the Fourth Proportional to 458.10, 686.61 and 263.10

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Solution

The fourth proportional to 458.10, 686.61 and 263.10 is: 394.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.10 : 686.61 = 263.10 : x
  2. Step 2: Convert to fraction form
    458.10/686.61 = 263.10/x
  3. Step 3: Cross multiply
    458.10x = 686.61 × 263.10
  4. Step 4: Simplify right side
    458.10x = 180,647.09
  5. Step 5: Solve for x
    x = 180,647.09/458.10
  6. Step 6: Final answer
    x = 394.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.