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Finding the Fourth Proportional to 1,628.55, 2,442.63 and 458.67

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Solution

The fourth proportional to 1,628.55, 2,442.63 and 458.67 is: 687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.55 : 2,442.63 = 458.67 : x
  2. Step 2: Convert to fraction form
    1,628.55/2,442.63 = 458.67/x
  3. Step 3: Cross multiply
    1,628.55x = 2,442.63 × 458.67
  4. Step 4: Simplify right side
    1,628.55x = 1,120,361.10
  5. Step 5: Solve for x
    x = 1,120,361.10/1,628.55
  6. Step 6: Final answer
    x = 687.95

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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.