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Finding the Fourth Proportional to 458.81, 688.02 and 285.22

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Solution

The fourth proportional to 458.81, 688.02 and 285.22 is: 427.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.81 : 688.02 = 285.22 : x
  2. Step 2: Convert to fraction form
    458.81/688.02 = 285.22/x
  3. Step 3: Cross multiply
    458.81x = 688.02 × 285.22
  4. Step 4: Simplify right side
    458.81x = 196,235.34
  5. Step 5: Solve for x
    x = 196,235.34/458.81
  6. Step 6: Final answer
    x = 427.70

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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.