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Finding the Fourth Proportional to 994.40, 1,490.71 and 377.69

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Solution

The fourth proportional to 994.40, 1,490.71 and 377.69 is: 566.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.40 : 1,490.71 = 377.69 : x
  2. Step 2: Convert to fraction form
    994.40/1,490.71 = 377.69/x
  3. Step 3: Cross multiply
    994.40x = 1,490.71 × 377.69
  4. Step 4: Simplify right side
    994.40x = 563,026.26
  5. Step 5: Solve for x
    x = 563,026.26/994.40
  6. Step 6: Final answer
    x = 566.20

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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.