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Finding the Fourth Proportional to 979.42, 1,469.05 and 362.84

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Solution

The fourth proportional to 979.42, 1,469.05 and 362.84 is: 544.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.42 : 1,469.05 = 362.84 : x
  2. Step 2: Convert to fraction form
    979.42/1,469.05 = 362.84/x
  3. Step 3: Cross multiply
    979.42x = 1,469.05 × 362.84
  4. Step 4: Simplify right side
    979.42x = 533,030.10
  5. Step 5: Solve for x
    x = 533,030.10/979.42
  6. Step 6: Final answer
    x = 544.23

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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.