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Finding the Fourth Proportional to 644.13, 969.63 and 554.82

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Solution

The fourth proportional to 644.13, 969.63 and 554.82 is: 835.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.13 : 969.63 = 554.82 : x
  2. Step 2: Convert to fraction form
    644.13/969.63 = 554.82/x
  3. Step 3: Cross multiply
    644.13x = 969.63 × 554.82
  4. Step 4: Simplify right side
    644.13x = 537,970.12
  5. Step 5: Solve for x
    x = 537,970.12/644.13
  6. Step 6: Final answer
    x = 835.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.