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Finding the Fourth Proportional to 935.73, 1,403.70 and 729.90

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Solution

The fourth proportional to 935.73, 1,403.70 and 729.90 is: 1,094.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.73 : 1,403.70 = 729.90 : x
  2. Step 2: Convert to fraction form
    935.73/1,403.70 = 729.90/x
  3. Step 3: Cross multiply
    935.73x = 1,403.70 × 729.90
  4. Step 4: Simplify right side
    935.73x = 1,024,560.63
  5. Step 5: Solve for x
    x = 1,024,560.63/935.73
  6. Step 6: Final answer
    x = 1,094.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.