Home / 2,987.93-4,123.45-1,643.60

Finding the Fourth Proportional to 2,987.93, 4,123.45 and 1,643.60

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Solution

The fourth proportional to 2,987.93, 4,123.45 and 1,643.60 is: 2,268.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.93 : 4,123.45 = 1,643.60 : x
  2. Step 2: Convert to fraction form
    2,987.93/4,123.45 = 1,643.60/x
  3. Step 3: Cross multiply
    2,987.93x = 4,123.45 × 1,643.60
  4. Step 4: Simplify right side
    2,987.93x = 6,777,283.89
  5. Step 5: Solve for x
    x = 6,777,283.89/2,987.93
  6. Step 6: Final answer
    x = 2,268.22

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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.