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Finding the Fourth Proportional to 507.66, 700.57 and 274.78

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Solution

The fourth proportional to 507.66, 700.57 and 274.78 is: 379.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.66 : 700.57 = 274.78 : x
  2. Step 2: Convert to fraction form
    507.66/700.57 = 274.78/x
  3. Step 3: Cross multiply
    507.66x = 700.57 × 274.78
  4. Step 4: Simplify right side
    507.66x = 192,502.30
  5. Step 5: Solve for x
    x = 192,502.30/507.66
  6. Step 6: Final answer
    x = 379.20

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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.