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Finding the Fourth Proportional to 502.76, 694.12 and 306.60

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Solution

The fourth proportional to 502.76, 694.12 and 306.60 is: 423.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.76 : 694.12 = 306.60 : x
  2. Step 2: Convert to fraction form
    502.76/694.12 = 306.60/x
  3. Step 3: Cross multiply
    502.76x = 694.12 × 306.60
  4. Step 4: Simplify right side
    502.76x = 212,817.19
  5. Step 5: Solve for x
    x = 212,817.19/502.76
  6. Step 6: Final answer
    x = 423.30

Related Problems

Find fourth proportional to 251.38, 347.06 and 153.30
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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.