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Finding the Fourth Proportional to 555.26, 766.33 and 378.47

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Solution

The fourth proportional to 555.26, 766.33 and 378.47 is: 522.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.26 : 766.33 = 378.47 : x
  2. Step 2: Convert to fraction form
    555.26/766.33 = 378.47/x
  3. Step 3: Cross multiply
    555.26x = 766.33 × 378.47
  4. Step 4: Simplify right side
    555.26x = 290,033.88
  5. Step 5: Solve for x
    x = 290,033.88/555.26
  6. Step 6: Final answer
    x = 522.34

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.