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Finding the Fourth Proportional to 563.55, 777.79 and 339.51

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Solution

The fourth proportional to 563.55, 777.79 and 339.51 is: 468.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.55 : 777.79 = 339.51 : x
  2. Step 2: Convert to fraction form
    563.55/777.79 = 339.51/x
  3. Step 3: Cross multiply
    563.55x = 777.79 × 339.51
  4. Step 4: Simplify right side
    563.55x = 264,067.48
  5. Step 5: Solve for x
    x = 264,067.48/563.55
  6. Step 6: Final answer
    x = 468.58

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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.