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Finding the Fourth Proportional to 980.02, 1,470.30 and 403.30

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Solution

The fourth proportional to 980.02, 1,470.30 and 403.30 is: 605.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.02 : 1,470.30 = 403.30 : x
  2. Step 2: Convert to fraction form
    980.02/1,470.30 = 403.30/x
  3. Step 3: Cross multiply
    980.02x = 1,470.30 × 403.30
  4. Step 4: Simplify right side
    980.02x = 592,971.99
  5. Step 5: Solve for x
    x = 592,971.99/980.02
  6. Step 6: Final answer
    x = 605.06

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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.