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Finding the Fourth Proportional to 555.54, 766.86 and 369.21

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Solution

The fourth proportional to 555.54, 766.86 and 369.21 is: 509.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.54 : 766.86 = 369.21 : x
  2. Step 2: Convert to fraction form
    555.54/766.86 = 369.21/x
  3. Step 3: Cross multiply
    555.54x = 766.86 × 369.21
  4. Step 4: Simplify right side
    555.54x = 283,132.38
  5. Step 5: Solve for x
    x = 283,132.38/555.54
  6. Step 6: Final answer
    x = 509.65

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.