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Finding the Fourth Proportional to 507.95, 700.89 and 286.90

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Solution

The fourth proportional to 507.95, 700.89 and 286.90 is: 395.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.95 : 700.89 = 286.90 : x
  2. Step 2: Convert to fraction form
    507.95/700.89 = 286.90/x
  3. Step 3: Cross multiply
    507.95x = 700.89 × 286.90
  4. Step 4: Simplify right side
    507.95x = 201,085.34
  5. Step 5: Solve for x
    x = 201,085.34/507.95
  6. Step 6: Final answer
    x = 395.88

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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.