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Finding the Fourth Proportional to 507.36, 700.38 and 391.44

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Solution

The fourth proportional to 507.36, 700.38 and 391.44 is: 540.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.36 : 700.38 = 391.44 : x
  2. Step 2: Convert to fraction form
    507.36/700.38 = 391.44/x
  3. Step 3: Cross multiply
    507.36x = 700.38 × 391.44
  4. Step 4: Simplify right side
    507.36x = 274,156.75
  5. Step 5: Solve for x
    x = 274,156.75/507.36
  6. Step 6: Final answer
    x = 540.36

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Double scale
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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.