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Finding the Fourth Proportional to 7,223.40, 9,968.40 and 4,079.79

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Solution

The fourth proportional to 7,223.40, 9,968.40 and 4,079.79 is: 5,630.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,223.40 : 9,968.40 = 4,079.79 : x
  2. Step 2: Convert to fraction form
    7,223.40/9,968.40 = 4,079.79/x
  3. Step 3: Cross multiply
    7,223.40x = 9,968.40 × 4,079.79
  4. Step 4: Simplify right side
    7,223.40x = 40,668,978.64
  5. Step 5: Solve for x
    x = 40,668,978.64/7,223.40
  6. Step 6: Final answer
    x = 5,630.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.