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Finding the Fourth Proportional to 2,625.45, 3,939.02 and 776.58

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Solution

The fourth proportional to 2,625.45, 3,939.02 and 776.58 is: 1,165.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.45 : 3,939.02 = 776.58 : x
  2. Step 2: Convert to fraction form
    2,625.45/3,939.02 = 776.58/x
  3. Step 3: Cross multiply
    2,625.45x = 3,939.02 × 776.58
  4. Step 4: Simplify right side
    2,625.45x = 3,058,960.27
  5. Step 5: Solve for x
    x = 3,058,960.27/2,625.45
  6. Step 6: Final answer
    x = 1,165.12

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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.