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Finding the Fourth Proportional to 897.56, 1,238.32 and 561.23

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Solution

The fourth proportional to 897.56, 1,238.32 and 561.23 is: 774.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.56 : 1,238.32 = 561.23 : x
  2. Step 2: Convert to fraction form
    897.56/1,238.32 = 561.23/x
  3. Step 3: Cross multiply
    897.56x = 1,238.32 × 561.23
  4. Step 4: Simplify right side
    897.56x = 694,983.74
  5. Step 5: Solve for x
    x = 694,983.74/897.56
  6. Step 6: Final answer
    x = 774.31

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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.