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Finding the Fourth Proportional to 3,907.05, 5,391.12 and 2,415.45

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Solution

The fourth proportional to 3,907.05, 5,391.12 and 2,415.45 is: 3,332.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.05 : 5,391.12 = 2,415.45 : x
  2. Step 2: Convert to fraction form
    3,907.05/5,391.12 = 2,415.45/x
  3. Step 3: Cross multiply
    3,907.05x = 5,391.12 × 2,415.45
  4. Step 4: Simplify right side
    3,907.05x = 13,021,980.80
  5. Step 5: Solve for x
    x = 13,021,980.80/3,907.05
  6. Step 6: Final answer
    x = 3,332.94

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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.