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Finding the Fourth Proportional to 993.02, 1,489.74 and 376.70

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Solution

The fourth proportional to 993.02, 1,489.74 and 376.70 is: 565.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.02 : 1,489.74 = 376.70 : x
  2. Step 2: Convert to fraction form
    993.02/1,489.74 = 376.70/x
  3. Step 3: Cross multiply
    993.02x = 1,489.74 × 376.70
  4. Step 4: Simplify right side
    993.02x = 561,185.06
  5. Step 5: Solve for x
    x = 561,185.06/993.02
  6. Step 6: Final answer
    x = 565.13

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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.