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Finding the Fourth Proportional to 400.59, 551.88 and 289.35

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Solution

The fourth proportional to 400.59, 551.88 and 289.35 is: 398.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.59 : 551.88 = 289.35 : x
  2. Step 2: Convert to fraction form
    400.59/551.88 = 289.35/x
  3. Step 3: Cross multiply
    400.59x = 551.88 × 289.35
  4. Step 4: Simplify right side
    400.59x = 159,686.48
  5. Step 5: Solve for x
    x = 159,686.48/400.59
  6. Step 6: Final answer
    x = 398.63

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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.