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Finding the Fourth Proportional to 7,328.40, 10,997.40 and 4,208.40

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Solution

The fourth proportional to 7,328.40, 10,997.40 and 4,208.40 is: 6,315.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,328.40 : 10,997.40 = 4,208.40 : x
  2. Step 2: Convert to fraction form
    7,328.40/10,997.40 = 4,208.40/x
  3. Step 3: Cross multiply
    7,328.40x = 10,997.40 × 4,208.40
  4. Step 4: Simplify right side
    7,328.40x = 46,281,458.16
  5. Step 5: Solve for x
    x = 46,281,458.16/7,328.40
  6. Step 6: Final answer
    x = 6,315.36

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1.5x scale

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.