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Finding the Fourth Proportional to 1,451.63, 2,003.21 and 788.48

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Solution

The fourth proportional to 1,451.63, 2,003.21 and 788.48 is: 1,088.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.63 : 2,003.21 = 788.48 : x
  2. Step 2: Convert to fraction form
    1,451.63/2,003.21 = 788.48/x
  3. Step 3: Cross multiply
    1,451.63x = 2,003.21 × 788.48
  4. Step 4: Simplify right side
    1,451.63x = 1,579,481.00
  5. Step 5: Solve for x
    x = 1,579,481.00/1,451.63
  6. Step 6: Final answer
    x = 1,088.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.