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Finding the Fourth Proportional to 777.50, 1,073.09 and 445.93

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Solution

The fourth proportional to 777.50, 1,073.09 and 445.93 is: 615.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.50 : 1,073.09 = 445.93 : x
  2. Step 2: Convert to fraction form
    777.50/1,073.09 = 445.93/x
  3. Step 3: Cross multiply
    777.50x = 1,073.09 × 445.93
  4. Step 4: Simplify right side
    777.50x = 478,517.66
  5. Step 5: Solve for x
    x = 478,517.66/777.50
  6. Step 6: Final answer
    x = 615.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.