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Finding the Fourth Proportional to 1,135.79, 1,703.21 and 355.58

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Solution

The fourth proportional to 1,135.79, 1,703.21 and 355.58 is: 533.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.79 : 1,703.21 = 355.58 : x
  2. Step 2: Convert to fraction form
    1,135.79/1,703.21 = 355.58/x
  3. Step 3: Cross multiply
    1,135.79x = 1,703.21 × 355.58
  4. Step 4: Simplify right side
    1,135.79x = 605,629.89
  5. Step 5: Solve for x
    x = 605,629.89/1,135.79
  6. Step 6: Final answer
    x = 533.22

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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.