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Finding the Fourth Proportional to 741.79, 1,023.99 and 521.56

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Solution

The fourth proportional to 741.79, 1,023.99 and 521.56 is: 719.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.79 : 1,023.99 = 521.56 : x
  2. Step 2: Convert to fraction form
    741.79/1,023.99 = 521.56/x
  3. Step 3: Cross multiply
    741.79x = 1,023.99 × 521.56
  4. Step 4: Simplify right side
    741.79x = 534,072.22
  5. Step 5: Solve for x
    x = 534,072.22/741.79
  6. Step 6: Final answer
    x = 719.98

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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.