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Finding the Fourth Proportional to 644.70, 885.84 and 526.39

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Solution

The fourth proportional to 644.70, 885.84 and 526.39 is: 723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.70 : 885.84 = 526.39 : x
  2. Step 2: Convert to fraction form
    644.70/885.84 = 526.39/x
  3. Step 3: Cross multiply
    644.70x = 885.84 × 526.39
  4. Step 4: Simplify right side
    644.70x = 466,297.32
  5. Step 5: Solve for x
    x = 466,297.32/644.70
  6. Step 6: Final answer
    x = 723.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.