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Finding the Fourth Proportional to 776.98, 1,165.36 and 283.38

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Solution

The fourth proportional to 776.98, 1,165.36 and 283.38 is: 425.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.98 : 1,165.36 = 283.38 : x
  2. Step 2: Convert to fraction form
    776.98/1,165.36 = 283.38/x
  3. Step 3: Cross multiply
    776.98x = 1,165.36 × 283.38
  4. Step 4: Simplify right side
    776.98x = 330,239.72
  5. Step 5: Solve for x
    x = 330,239.72/776.98
  6. Step 6: Final answer
    x = 425.03

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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.