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Finding the Fourth Proportional to 1,335.42, 2,004.62 and 788

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Solution

The fourth proportional to 1,335.42, 2,004.62 and 788 is: 1,182.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.42 : 2,004.62 = 788 : x
  2. Step 2: Convert to fraction form
    1,335.42/2,004.62 = 788/x
  3. Step 3: Cross multiply
    1,335.42x = 2,004.62 × 788
  4. Step 4: Simplify right side
    1,335.42x = 1,579,640.56
  5. Step 5: Solve for x
    x = 1,579,640.56/1,335.42
  6. Step 6: Final answer
    x = 1,182.88

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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.