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Finding the Fourth Proportional to 783.21, 1,174.68 and 296.18

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Solution

The fourth proportional to 783.21, 1,174.68 and 296.18 is: 444.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.21 : 1,174.68 = 296.18 : x
  2. Step 2: Convert to fraction form
    783.21/1,174.68 = 296.18/x
  3. Step 3: Cross multiply
    783.21x = 1,174.68 × 296.18
  4. Step 4: Simplify right side
    783.21x = 347,916.72
  5. Step 5: Solve for x
    x = 347,916.72/783.21
  6. Step 6: Final answer
    x = 444.22

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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.