Home / 2,175.79-3,002.60-1,291.57

Finding the Fourth Proportional to 2,175.79, 3,002.60 and 1,291.57

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Solution

The fourth proportional to 2,175.79, 3,002.60 and 1,291.57 is: 1,782.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.79 : 3,002.60 = 1,291.57 : x
  2. Step 2: Convert to fraction form
    2,175.79/3,002.60 = 1,291.57/x
  3. Step 3: Cross multiply
    2,175.79x = 3,002.60 × 1,291.57
  4. Step 4: Simplify right side
    2,175.79x = 3,878,068.08
  5. Step 5: Solve for x
    x = 3,878,068.08/2,175.79
  6. Step 6: Final answer
    x = 1,782.37

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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.