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Finding the Fourth Proportional to 507.69, 700.27 and 308.47

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Solution

The fourth proportional to 507.69, 700.27 and 308.47 is: 425.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.69 : 700.27 = 308.47 : x
  2. Step 2: Convert to fraction form
    507.69/700.27 = 308.47/x
  3. Step 3: Cross multiply
    507.69x = 700.27 × 308.47
  4. Step 4: Simplify right side
    507.69x = 216,012.29
  5. Step 5: Solve for x
    x = 216,012.29/507.69
  6. Step 6: Final answer
    x = 425.48

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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.