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Finding the Fourth Proportional to 555.25, 766.27 and 319.19

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Solution

The fourth proportional to 555.25, 766.27 and 319.19 is: 440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.25 : 766.27 = 319.19 : x
  2. Step 2: Convert to fraction form
    555.25/766.27 = 319.19/x
  3. Step 3: Cross multiply
    555.25x = 766.27 × 319.19
  4. Step 4: Simplify right side
    555.25x = 244,585.72
  5. Step 5: Solve for x
    x = 244,585.72/555.25
  6. Step 6: Final answer
    x = 440.50

Related Problems

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Half scale
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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.