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Finding the Fourth Proportional to 563.51, 777.65 and 314.85

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Solution

The fourth proportional to 563.51, 777.65 and 314.85 is: 434.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.51 : 777.65 = 314.85 : x
  2. Step 2: Convert to fraction form
    563.51/777.65 = 314.85/x
  3. Step 3: Cross multiply
    563.51x = 777.65 × 314.85
  4. Step 4: Simplify right side
    563.51x = 244,843.10
  5. Step 5: Solve for x
    x = 244,843.10/563.51
  6. Step 6: Final answer
    x = 434.50

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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.