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Finding the Fourth Proportional to 1,340.31, 1,849 and 835.74

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Solution

The fourth proportional to 1,340.31, 1,849 and 835.74 is: 1,152.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.31 : 1,849 = 835.74 : x
  2. Step 2: Convert to fraction form
    1,340.31/1,849 = 835.74/x
  3. Step 3: Cross multiply
    1,340.31x = 1,849 × 835.74
  4. Step 4: Simplify right side
    1,340.31x = 1,545,283.26
  5. Step 5: Solve for x
    x = 1,545,283.26/1,340.31
  6. Step 6: Final answer
    x = 1,152.93

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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.