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Finding the Fourth Proportional to 511.11, 766.43 and 303.09

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Solution

The fourth proportional to 511.11, 766.43 and 303.09 is: 454.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.11 : 766.43 = 303.09 : x
  2. Step 2: Convert to fraction form
    511.11/766.43 = 303.09/x
  3. Step 3: Cross multiply
    511.11x = 766.43 × 303.09
  4. Step 4: Simplify right side
    511.11x = 232,295.75
  5. Step 5: Solve for x
    x = 232,295.75/511.11
  6. Step 6: Final answer
    x = 454.49

Related Problems

Find fourth proportional to 255.56, 383.21 and 151.55
Half scale
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Double scale
Find fourth proportional to 512.11, 767.92 and 304.09
Similar ratio
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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.