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Finding the Fourth Proportional to 400.40, 552.72 and 302.18

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Solution

The fourth proportional to 400.40, 552.72 and 302.18 is: 417.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.40 : 552.72 = 302.18 : x
  2. Step 2: Convert to fraction form
    400.40/552.72 = 302.18/x
  3. Step 3: Cross multiply
    400.40x = 552.72 × 302.18
  4. Step 4: Simplify right side
    400.40x = 167,018.17
  5. Step 5: Solve for x
    x = 167,018.17/400.40
  6. Step 6: Final answer
    x = 417.13

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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.