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Finding the Fourth Proportional to 841.60, 1,160.40 and 701.92

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Solution

The fourth proportional to 841.60, 1,160.40 and 701.92 is: 967.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.60 : 1,160.40 = 701.92 : x
  2. Step 2: Convert to fraction form
    841.60/1,160.40 = 701.92/x
  3. Step 3: Cross multiply
    841.60x = 1,160.40 × 701.92
  4. Step 4: Simplify right side
    841.60x = 814,507.97
  5. Step 5: Solve for x
    x = 814,507.97/841.60
  6. Step 6: Final answer
    x = 967.81

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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.