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Finding the Fourth Proportional to 841.24, 1,160.94 and 491.92

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Solution

The fourth proportional to 841.24, 1,160.94 and 491.92 is: 678.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.24 : 1,160.94 = 491.92 : x
  2. Step 2: Convert to fraction form
    841.24/1,160.94 = 491.92/x
  3. Step 3: Cross multiply
    841.24x = 1,160.94 × 491.92
  4. Step 4: Simplify right side
    841.24x = 571,089.60
  5. Step 5: Solve for x
    x = 571,089.60/841.24
  6. Step 6: Final answer
    x = 678.87

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.