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Finding the Fourth Proportional to 994.30, 1,490.22 and 583.74

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Solution

The fourth proportional to 994.30, 1,490.22 and 583.74 is: 874.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.30 : 1,490.22 = 583.74 : x
  2. Step 2: Convert to fraction form
    994.30/1,490.22 = 583.74/x
  3. Step 3: Cross multiply
    994.30x = 1,490.22 × 583.74
  4. Step 4: Simplify right side
    994.30x = 869,901.02
  5. Step 5: Solve for x
    x = 869,901.02/994.30
  6. Step 6: Final answer
    x = 874.89

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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.