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Finding the Fourth Proportional to 507.31, 700.10 and 286.30

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Solution

The fourth proportional to 507.31, 700.10 and 286.30 is: 395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.31 : 700.10 = 286.30 : x
  2. Step 2: Convert to fraction form
    507.31/700.10 = 286.30/x
  3. Step 3: Cross multiply
    507.31x = 700.10 × 286.30
  4. Step 4: Simplify right side
    507.31x = 200,437.60
  5. Step 5: Solve for x
    x = 200,437.60/507.31
  6. Step 6: Final answer
    x = 395.10

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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.