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Finding the Fourth Proportional to 635, 876.50 and 561.56

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Solution

The fourth proportional to 635, 876.50 and 561.56 is: 775.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    635 : 876.50 = 561.56 : x
  2. Step 2: Convert to fraction form
    635/876.50 = 561.56/x
  3. Step 3: Cross multiply
    635x = 876.50 × 561.56
  4. Step 4: Simplify right side
    635x = 492,207.34
  5. Step 5: Solve for x
    x = 492,207.34/635
  6. Step 6: Final answer
    x = 775.13

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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.