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Finding the Fourth Proportional to 1,335.96, 2,003.88 and 458.55

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Solution

The fourth proportional to 1,335.96, 2,003.88 and 458.55 is: 687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.96 : 2,003.88 = 458.55 : x
  2. Step 2: Convert to fraction form
    1,335.96/2,003.88 = 458.55/x
  3. Step 3: Cross multiply
    1,335.96x = 2,003.88 × 458.55
  4. Step 4: Simplify right side
    1,335.96x = 918,879.17
  5. Step 5: Solve for x
    x = 918,879.17/1,335.96
  6. Step 6: Final answer
    x = 687.80

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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.