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Finding the Fourth Proportional to 5,225.40, 7,850.90 and 3,929.40

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Solution

The fourth proportional to 5,225.40, 7,850.90 and 3,929.40 is: 5,903.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,225.40 : 7,850.90 = 3,929.40 : x
  2. Step 2: Convert to fraction form
    5,225.40/7,850.90 = 3,929.40/x
  3. Step 3: Cross multiply
    5,225.40x = 7,850.90 × 3,929.40
  4. Step 4: Simplify right side
    5,225.40x = 30,849,326.46
  5. Step 5: Solve for x
    x = 30,849,326.46/5,225.40
  6. Step 6: Final answer
    x = 5,903.73

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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.