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Finding the Fourth Proportional to 612.87, 917.48 and 563.06

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Solution

The fourth proportional to 612.87, 917.48 and 563.06 is: 842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.87 : 917.48 = 563.06 : x
  2. Step 2: Convert to fraction form
    612.87/917.48 = 563.06/x
  3. Step 3: Cross multiply
    612.87x = 917.48 × 563.06
  4. Step 4: Simplify right side
    612.87x = 516,588.89
  5. Step 5: Solve for x
    x = 516,588.89/612.87
  6. Step 6: Final answer
    x = 842.90

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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.