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Finding the Fourth Proportional to 989.64, 1,484.48 and 296.15

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Solution

The fourth proportional to 989.64, 1,484.48 and 296.15 is: 444.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.64 : 1,484.48 = 296.15 : x
  2. Step 2: Convert to fraction form
    989.64/1,484.48 = 296.15/x
  3. Step 3: Cross multiply
    989.64x = 1,484.48 × 296.15
  4. Step 4: Simplify right side
    989.64x = 439,632.09
  5. Step 5: Solve for x
    x = 439,632.09/989.64
  6. Step 6: Final answer
    x = 444.23

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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.