Home / 2,589.64-3,569.58-1,985.40

Finding the Fourth Proportional to 2,589.64, 3,569.58 and 1,985.40

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Solution

The fourth proportional to 2,589.64, 3,569.58 and 1,985.40 is: 2,736.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,589.64 : 3,569.58 = 1,985.40 : x
  2. Step 2: Convert to fraction form
    2,589.64/3,569.58 = 1,985.40/x
  3. Step 3: Cross multiply
    2,589.64x = 3,569.58 × 1,985.40
  4. Step 4: Simplify right side
    2,589.64x = 7,087,044.13
  5. Step 5: Solve for x
    x = 7,087,044.13/2,589.64
  6. Step 6: Final answer
    x = 2,736.69

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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.