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Finding the Fourth Proportional to 551.62, 761.46 and 330.76

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Solution

The fourth proportional to 551.62, 761.46 and 330.76 is: 456.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.62 : 761.46 = 330.76 : x
  2. Step 2: Convert to fraction form
    551.62/761.46 = 330.76/x
  3. Step 3: Cross multiply
    551.62x = 761.46 × 330.76
  4. Step 4: Simplify right side
    551.62x = 251,860.51
  5. Step 5: Solve for x
    x = 251,860.51/551.62
  6. Step 6: Final answer
    x = 456.58

Related Problems

Find fourth proportional to 275.81, 380.73 and 165.38
Half scale
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Double scale
Find fourth proportional to 552.62, 762.84 and 331.76
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.