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Finding the Fourth Proportional to 618.49, 928.19 and 436.06

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Solution

The fourth proportional to 618.49, 928.19 and 436.06 is: 654.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.49 : 928.19 = 436.06 : x
  2. Step 2: Convert to fraction form
    618.49/928.19 = 436.06/x
  3. Step 3: Cross multiply
    618.49x = 928.19 × 436.06
  4. Step 4: Simplify right side
    618.49x = 404,746.53
  5. Step 5: Solve for x
    x = 404,746.53/618.49
  6. Step 6: Final answer
    x = 654.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.