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Finding the Fourth Proportional to 555.69, 765 and 471.27

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Solution

The fourth proportional to 555.69, 765 and 471.27 is: 648.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.69 : 765 = 471.27 : x
  2. Step 2: Convert to fraction form
    555.69/765 = 471.27/x
  3. Step 3: Cross multiply
    555.69x = 765 × 471.27
  4. Step 4: Simplify right side
    555.69x = 360,521.55
  5. Step 5: Solve for x
    x = 360,521.55/555.69
  6. Step 6: Final answer
    x = 648.78

Related Problems

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Double scale
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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.