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Finding the Fourth Proportional to 589.68, 813.78 and 356.76

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Solution

The fourth proportional to 589.68, 813.78 and 356.76 is: 492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.68 : 813.78 = 356.76 : x
  2. Step 2: Convert to fraction form
    589.68/813.78 = 356.76/x
  3. Step 3: Cross multiply
    589.68x = 813.78 × 356.76
  4. Step 4: Simplify right side
    589.68x = 290,324.15
  5. Step 5: Solve for x
    x = 290,324.15/589.68
  6. Step 6: Final answer
    x = 492.34

Related Problems

Find fourth proportional to 294.84, 406.89 and 178.38
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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.