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Finding the Fourth Proportional to 1,074.93, 1,612.18 and 458.68

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Solution

The fourth proportional to 1,074.93, 1,612.18 and 458.68 is: 687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.93 : 1,612.18 = 458.68 : x
  2. Step 2: Convert to fraction form
    1,074.93/1,612.18 = 458.68/x
  3. Step 3: Cross multiply
    1,074.93x = 1,612.18 × 458.68
  4. Step 4: Simplify right side
    1,074.93x = 739,474.72
  5. Step 5: Solve for x
    x = 739,474.72/1,074.93
  6. Step 6: Final answer
    x = 687.93

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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.