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Finding the Fourth Proportional to 1,155.15, 1,595.16 and 842.22

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Solution

The fourth proportional to 1,155.15, 1,595.16 and 842.22 is: 1,163.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.15 : 1,595.16 = 842.22 : x
  2. Step 2: Convert to fraction form
    1,155.15/1,595.16 = 842.22/x
  3. Step 3: Cross multiply
    1,155.15x = 1,595.16 × 842.22
  4. Step 4: Simplify right side
    1,155.15x = 1,343,475.66
  5. Step 5: Solve for x
    x = 1,343,475.66/1,155.15
  6. Step 6: Final answer
    x = 1,163.03

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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.