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Finding the Fourth Proportional to 458.55, 686.64 and 303.99

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Solution

The fourth proportional to 458.55, 686.64 and 303.99 is: 455.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.55 : 686.64 = 303.99 : x
  2. Step 2: Convert to fraction form
    458.55/686.64 = 303.99/x
  3. Step 3: Cross multiply
    458.55x = 686.64 × 303.99
  4. Step 4: Simplify right side
    458.55x = 208,731.87
  5. Step 5: Solve for x
    x = 208,731.87/458.55
  6. Step 6: Final answer
    x = 455.20

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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.