Home / 2,985.75-4,120.34-1,807.74

Finding the Fourth Proportional to 2,985.75, 4,120.34 and 1,807.74

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Solution

The fourth proportional to 2,985.75, 4,120.34 and 1,807.74 is: 2,494.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.75 : 4,120.34 = 1,807.74 : x
  2. Step 2: Convert to fraction form
    2,985.75/4,120.34 = 1,807.74/x
  3. Step 3: Cross multiply
    2,985.75x = 4,120.34 × 1,807.74
  4. Step 4: Simplify right side
    2,985.75x = 7,448,494.39
  5. Step 5: Solve for x
    x = 7,448,494.39/2,985.75
  6. Step 6: Final answer
    x = 2,494.68

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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.