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Finding the Fourth Proportional to 610.92, 919.56 and 554.40

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Solution

The fourth proportional to 610.92, 919.56 and 554.40 is: 834.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.92 : 919.56 = 554.40 : x
  2. Step 2: Convert to fraction form
    610.92/919.56 = 554.40/x
  3. Step 3: Cross multiply
    610.92x = 919.56 × 554.40
  4. Step 4: Simplify right side
    610.92x = 509,804.06
  5. Step 5: Solve for x
    x = 509,804.06/610.92
  6. Step 6: Final answer
    x = 834.49

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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.