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Finding the Fourth Proportional to 994.47, 1,490.79 and 474.14

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Solution

The fourth proportional to 994.47, 1,490.79 and 474.14 is: 710.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.47 : 1,490.79 = 474.14 : x
  2. Step 2: Convert to fraction form
    994.47/1,490.79 = 474.14/x
  3. Step 3: Cross multiply
    994.47x = 1,490.79 × 474.14
  4. Step 4: Simplify right side
    994.47x = 706,840.80
  5. Step 5: Solve for x
    x = 706,840.80/994.47
  6. Step 6: Final answer
    x = 710.77

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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.