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Finding the Fourth Proportional to 1,320.41, 1,980.62 and 498.94

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Solution

The fourth proportional to 1,320.41, 1,980.62 and 498.94 is: 748.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.41 : 1,980.62 = 498.94 : x
  2. Step 2: Convert to fraction form
    1,320.41/1,980.62 = 498.94/x
  3. Step 3: Cross multiply
    1,320.41x = 1,980.62 × 498.94
  4. Step 4: Simplify right side
    1,320.41x = 988,210.54
  5. Step 5: Solve for x
    x = 988,210.54/1,320.41
  6. Step 6: Final answer
    x = 748.41

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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.