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Finding the Fourth Proportional to 776.11, 1,070.90 and 444.47

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Solution

The fourth proportional to 776.11, 1,070.90 and 444.47 is: 613.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.11 : 1,070.90 = 444.47 : x
  2. Step 2: Convert to fraction form
    776.11/1,070.90 = 444.47/x
  3. Step 3: Cross multiply
    776.11x = 1,070.90 × 444.47
  4. Step 4: Simplify right side
    776.11x = 475,975.35
  5. Step 5: Solve for x
    x = 475,975.35/776.11
  6. Step 6: Final answer
    x = 613.29

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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.