Home / 1,345.17-2,020.93-791.30

Finding the Fourth Proportional to 1,345.17, 2,020.93 and 791.30

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Solution

The fourth proportional to 1,345.17, 2,020.93 and 791.30 is: 1,188.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.17 : 2,020.93 = 791.30 : x
  2. Step 2: Convert to fraction form
    1,345.17/2,020.93 = 791.30/x
  3. Step 3: Cross multiply
    1,345.17x = 2,020.93 × 791.30
  4. Step 4: Simplify right side
    1,345.17x = 1,599,159.30
  5. Step 5: Solve for x
    x = 1,599,159.30/1,345.17
  6. Step 6: Final answer
    x = 1,188.81

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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.