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Finding the Fourth Proportional to 994.29, 1,490.22 and 507.08

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Solution

The fourth proportional to 994.29, 1,490.22 and 507.08 is: 759.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.29 : 1,490.22 = 507.08 : x
  2. Step 2: Convert to fraction form
    994.29/1,490.22 = 507.08/x
  3. Step 3: Cross multiply
    994.29x = 1,490.22 × 507.08
  4. Step 4: Simplify right side
    994.29x = 755,653.31
  5. Step 5: Solve for x
    x = 755,653.31/994.29
  6. Step 6: Final answer
    x = 759.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.