Home / 3,139.61-4,709.25-1,290.26

Finding the Fourth Proportional to 3,139.61, 4,709.25 and 1,290.26

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Solution

The fourth proportional to 3,139.61, 4,709.25 and 1,290.26 is: 1,935.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.61 : 4,709.25 = 1,290.26 : x
  2. Step 2: Convert to fraction form
    3,139.61/4,709.25 = 1,290.26/x
  3. Step 3: Cross multiply
    3,139.61x = 4,709.25 × 1,290.26
  4. Step 4: Simplify right side
    3,139.61x = 6,076,156.91
  5. Step 5: Solve for x
    x = 6,076,156.91/3,139.61
  6. Step 6: Final answer
    x = 1,935.32

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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.