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Finding the Fourth Proportional to 1,135.10, 1,567.04 and 764.03

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Solution

The fourth proportional to 1,135.10, 1,567.04 and 764.03 is: 1,054.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.10 : 1,567.04 = 764.03 : x
  2. Step 2: Convert to fraction form
    1,135.10/1,567.04 = 764.03/x
  3. Step 3: Cross multiply
    1,135.10x = 1,567.04 × 764.03
  4. Step 4: Simplify right side
    1,135.10x = 1,197,253.92
  5. Step 5: Solve for x
    x = 1,197,253.92/1,135.10
  6. Step 6: Final answer
    x = 1,054.76

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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.