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Finding the Fourth Proportional to 941.14, 1,298.78 and 521.48

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Solution

The fourth proportional to 941.14, 1,298.78 and 521.48 is: 719.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.14 : 1,298.78 = 521.48 : x
  2. Step 2: Convert to fraction form
    941.14/1,298.78 = 521.48/x
  3. Step 3: Cross multiply
    941.14x = 1,298.78 × 521.48
  4. Step 4: Simplify right side
    941.14x = 677,287.79
  5. Step 5: Solve for x
    x = 677,287.79/941.14
  6. Step 6: Final answer
    x = 719.65

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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.