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Finding the Fourth Proportional to 666.56, 918 and 652.22

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Solution

The fourth proportional to 666.56, 918 and 652.22 is: 898.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.56 : 918 = 652.22 : x
  2. Step 2: Convert to fraction form
    666.56/918 = 652.22/x
  3. Step 3: Cross multiply
    666.56x = 918 × 652.22
  4. Step 4: Simplify right side
    666.56x = 598,737.96
  5. Step 5: Solve for x
    x = 598,737.96/666.56
  6. Step 6: Final answer
    x = 898.25

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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.