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Finding the Fourth Proportional to 576.32, 858.28 and 551.36

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Solution

The fourth proportional to 576.32, 858.28 and 551.36 is: 821.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.32 : 858.28 = 551.36 : x
  2. Step 2: Convert to fraction form
    576.32/858.28 = 551.36/x
  3. Step 3: Cross multiply
    576.32x = 858.28 × 551.36
  4. Step 4: Simplify right side
    576.32x = 473,221.26
  5. Step 5: Solve for x
    x = 473,221.26/576.32
  6. Step 6: Final answer
    x = 821.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.