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Finding the Fourth Proportional to 979.75, 1,470.03 and 403.03

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Solution

The fourth proportional to 979.75, 1,470.03 and 403.03 is: 604.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.75 : 1,470.03 = 403.03 : x
  2. Step 2: Convert to fraction form
    979.75/1,470.03 = 403.03/x
  3. Step 3: Cross multiply
    979.75x = 1,470.03 × 403.03
  4. Step 4: Simplify right side
    979.75x = 592,466.19
  5. Step 5: Solve for x
    x = 592,466.19/979.75
  6. Step 6: Final answer
    x = 604.71

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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.