Home / 2,888.28-3,985.83-1,561.99

Finding the Fourth Proportional to 2,888.28, 3,985.83 and 1,561.99

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Solution

The fourth proportional to 2,888.28, 3,985.83 and 1,561.99 is: 2,155.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,888.28 : 3,985.83 = 1,561.99 : x
  2. Step 2: Convert to fraction form
    2,888.28/3,985.83 = 1,561.99/x
  3. Step 3: Cross multiply
    2,888.28x = 3,985.83 × 1,561.99
  4. Step 4: Simplify right side
    2,888.28x = 6,225,802.77
  5. Step 5: Solve for x
    x = 6,225,802.77/2,888.28
  6. Step 6: Final answer
    x = 2,155.54

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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.