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Finding the Fourth Proportional to 994.68, 1,490.94 and 474.93

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Solution

The fourth proportional to 994.68, 1,490.94 and 474.93 is: 711.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.68 : 1,490.94 = 474.93 : x
  2. Step 2: Convert to fraction form
    994.68/1,490.94 = 474.93/x
  3. Step 3: Cross multiply
    994.68x = 1,490.94 × 474.93
  4. Step 4: Simplify right side
    994.68x = 708,092.13
  5. Step 5: Solve for x
    x = 708,092.13/994.68
  6. Step 6: Final answer
    x = 711.88

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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.