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Finding the Fourth Proportional to 551.80, 761.32 and 330.76

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Solution

The fourth proportional to 551.80, 761.32 and 330.76 is: 456.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.80 : 761.32 = 330.76 : x
  2. Step 2: Convert to fraction form
    551.80/761.32 = 330.76/x
  3. Step 3: Cross multiply
    551.80x = 761.32 × 330.76
  4. Step 4: Simplify right side
    551.80x = 251,814.20
  5. Step 5: Solve for x
    x = 251,814.20/551.80
  6. Step 6: Final answer
    x = 456.35

Related Problems

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Double scale
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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.