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Finding the Fourth Proportional to 551.47, 827.40 and 397.57

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Solution

The fourth proportional to 551.47, 827.40 and 397.57 is: 596.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.47 : 827.40 = 397.57 : x
  2. Step 2: Convert to fraction form
    551.47/827.40 = 397.57/x
  3. Step 3: Cross multiply
    551.47x = 827.40 × 397.57
  4. Step 4: Simplify right side
    551.47x = 328,948.84
  5. Step 5: Solve for x
    x = 328,948.84/551.47
  6. Step 6: Final answer
    x = 596.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.