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Finding the Fourth Proportional to 400.84, 553.13 and 290.35

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Solution

The fourth proportional to 400.84, 553.13 and 290.35 is: 400.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.84 : 553.13 = 290.35 : x
  2. Step 2: Convert to fraction form
    400.84/553.13 = 290.35/x
  3. Step 3: Cross multiply
    400.84x = 553.13 × 290.35
  4. Step 4: Simplify right side
    400.84x = 160,599.29
  5. Step 5: Solve for x
    x = 160,599.29/400.84
  6. Step 6: Final answer
    x = 400.66

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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.