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Finding the Fourth Proportional to 563.31, 842.63 and 528.75

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Solution

The fourth proportional to 563.31, 842.63 and 528.75 is: 790.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.31 : 842.63 = 528.75 : x
  2. Step 2: Convert to fraction form
    563.31/842.63 = 528.75/x
  3. Step 3: Cross multiply
    563.31x = 842.63 × 528.75
  4. Step 4: Simplify right side
    563.31x = 445,537.97
  5. Step 5: Solve for x
    x = 445,537.97/563.31
  6. Step 6: Final answer
    x = 790.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.