Home / 2,987.89-4,122.63-1,808.93

Finding the Fourth Proportional to 2,987.89, 4,122.63 and 1,808.93

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Solution

The fourth proportional to 2,987.89, 4,122.63 and 1,808.93 is: 2,495.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.89 : 4,122.63 = 1,808.93 : x
  2. Step 2: Convert to fraction form
    2,987.89/4,122.63 = 1,808.93/x
  3. Step 3: Cross multiply
    2,987.89x = 4,122.63 × 1,808.93
  4. Step 4: Simplify right side
    2,987.89x = 7,457,549.09
  5. Step 5: Solve for x
    x = 7,457,549.09/2,987.89
  6. Step 6: Final answer
    x = 2,495.92

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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.