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Finding the Fourth Proportional to 563.39, 777.45 and 314.66

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Solution

The fourth proportional to 563.39, 777.45 and 314.66 is: 434.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.39 : 777.45 = 314.66 : x
  2. Step 2: Convert to fraction form
    563.39/777.45 = 314.66/x
  3. Step 3: Cross multiply
    563.39x = 777.45 × 314.66
  4. Step 4: Simplify right side
    563.39x = 244,628.32
  5. Step 5: Solve for x
    x = 244,628.32/563.39
  6. Step 6: Final answer
    x = 434.21

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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.