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Finding the Fourth Proportional to 528.03, 727.02 and 449.19

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Solution

The fourth proportional to 528.03, 727.02 and 449.19 is: 618.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.03 : 727.02 = 449.19 : x
  2. Step 2: Convert to fraction form
    528.03/727.02 = 449.19/x
  3. Step 3: Cross multiply
    528.03x = 727.02 × 449.19
  4. Step 4: Simplify right side
    528.03x = 326,570.11
  5. Step 5: Solve for x
    x = 326,570.11/528.03
  6. Step 6: Final answer
    x = 618.47

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Double scale
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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.