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Finding the Fourth Proportional to 986.02, 1,479.93 and 499.41

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Solution

The fourth proportional to 986.02, 1,479.93 and 499.41 is: 749.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.02 : 1,479.93 = 499.41 : x
  2. Step 2: Convert to fraction form
    986.02/1,479.93 = 499.41/x
  3. Step 3: Cross multiply
    986.02x = 1,479.93 × 499.41
  4. Step 4: Simplify right side
    986.02x = 739,091.84
  5. Step 5: Solve for x
    x = 739,091.84/986.02
  6. Step 6: Final answer
    x = 749.57

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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.