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Finding the Fourth Proportional to 777.47, 1,165.73 and 366.80

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Solution

The fourth proportional to 777.47, 1,165.73 and 366.80 is: 549.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.47 : 1,165.73 = 366.80 : x
  2. Step 2: Convert to fraction form
    777.47/1,165.73 = 366.80/x
  3. Step 3: Cross multiply
    777.47x = 1,165.73 × 366.80
  4. Step 4: Simplify right side
    777.47x = 427,582.10
  5. Step 5: Solve for x
    x = 427,582.10/777.47
  6. Step 6: Final answer
    x = 549.97

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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.