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Finding the Fourth Proportional to 446.48, 616.96 and 403.28

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Solution

The fourth proportional to 446.48, 616.96 and 403.28 is: 557.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.48 : 616.96 = 403.28 : x
  2. Step 2: Convert to fraction form
    446.48/616.96 = 403.28/x
  3. Step 3: Cross multiply
    446.48x = 616.96 × 403.28
  4. Step 4: Simplify right side
    446.48x = 248,807.63
  5. Step 5: Solve for x
    x = 248,807.63/446.48
  6. Step 6: Final answer
    x = 557.26

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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.