Home / 2,888.09-3,985.55-1,561.79

Finding the Fourth Proportional to 2,888.09, 3,985.55 and 1,561.79

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Solution

The fourth proportional to 2,888.09, 3,985.55 and 1,561.79 is: 2,155.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,888.09 : 3,985.55 = 1,561.79 : x
  2. Step 2: Convert to fraction form
    2,888.09/3,985.55 = 1,561.79/x
  3. Step 3: Cross multiply
    2,888.09x = 3,985.55 × 1,561.79
  4. Step 4: Simplify right side
    2,888.09x = 6,224,600.15
  5. Step 5: Solve for x
    x = 6,224,600.15/2,888.09
  6. Step 6: Final answer
    x = 2,155.26

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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.