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Finding the Fourth Proportional to 507.64, 761.70 and 345.64

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Solution

The fourth proportional to 507.64, 761.70 and 345.64 is: 518.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.64 : 761.70 = 345.64 : x
  2. Step 2: Convert to fraction form
    507.64/761.70 = 345.64/x
  3. Step 3: Cross multiply
    507.64x = 761.70 × 345.64
  4. Step 4: Simplify right side
    507.64x = 263,273.99
  5. Step 5: Solve for x
    x = 263,273.99/507.64
  6. Step 6: Final answer
    x = 518.62

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.