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Finding the Fourth Proportional to 563.47, 777.55 and 314.81

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Solution

The fourth proportional to 563.47, 777.55 and 314.81 is: 434.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.47 : 777.55 = 314.81 : x
  2. Step 2: Convert to fraction form
    563.47/777.55 = 314.81/x
  3. Step 3: Cross multiply
    563.47x = 777.55 × 314.81
  4. Step 4: Simplify right side
    563.47x = 244,776.63
  5. Step 5: Solve for x
    x = 244,776.63/563.47
  6. Step 6: Final answer
    x = 434.41

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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.