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Finding the Fourth Proportional to 783.02, 1,174.49 and 263.03

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Solution

The fourth proportional to 783.02, 1,174.49 and 263.03 is: 394.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.02 : 1,174.49 = 263.03 : x
  2. Step 2: Convert to fraction form
    783.02/1,174.49 = 263.03/x
  3. Step 3: Cross multiply
    783.02x = 1,174.49 × 263.03
  4. Step 4: Simplify right side
    783.02x = 308,922.29
  5. Step 5: Solve for x
    x = 308,922.29/783.02
  6. Step 6: Final answer
    x = 394.53

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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.