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Finding the Fourth Proportional to 994.47, 1,491.70 and 377.72

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Solution

The fourth proportional to 994.47, 1,491.70 and 377.72 is: 566.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.47 : 1,491.70 = 377.72 : x
  2. Step 2: Convert to fraction form
    994.47/1,491.70 = 377.72/x
  3. Step 3: Cross multiply
    994.47x = 1,491.70 × 377.72
  4. Step 4: Simplify right side
    994.47x = 563,444.92
  5. Step 5: Solve for x
    x = 563,444.92/994.47
  6. Step 6: Final answer
    x = 566.58

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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.