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Finding the Fourth Proportional to 979.90, 1,470.42 and 364.03

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Solution

The fourth proportional to 979.90, 1,470.42 and 364.03 is: 546.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.90 : 1,470.42 = 364.03 : x
  2. Step 2: Convert to fraction form
    979.90/1,470.42 = 364.03/x
  3. Step 3: Cross multiply
    979.90x = 1,470.42 × 364.03
  4. Step 4: Simplify right side
    979.90x = 535,276.99
  5. Step 5: Solve for x
    x = 535,276.99/979.90
  6. Step 6: Final answer
    x = 546.26

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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.