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Finding the Fourth Proportional to 1,402.56, 1,935.32 and 842.92

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Solution

The fourth proportional to 1,402.56, 1,935.32 and 842.92 is: 1,163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.56 : 1,935.32 = 842.92 : x
  2. Step 2: Convert to fraction form
    1,402.56/1,935.32 = 842.92/x
  3. Step 3: Cross multiply
    1,402.56x = 1,935.32 × 842.92
  4. Step 4: Simplify right side
    1,402.56x = 1,631,319.93
  5. Step 5: Solve for x
    x = 1,631,319.93/1,402.56
  6. Step 6: Final answer
    x = 1,163.10

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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.