Home / 2,085.28-2,880.05-1,420.99

Finding the Fourth Proportional to 2,085.28, 2,880.05 and 1,420.99

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Solution

The fourth proportional to 2,085.28, 2,880.05 and 1,420.99 is: 1,962.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.28 : 2,880.05 = 1,420.99 : x
  2. Step 2: Convert to fraction form
    2,085.28/2,880.05 = 1,420.99/x
  3. Step 3: Cross multiply
    2,085.28x = 2,880.05 × 1,420.99
  4. Step 4: Simplify right side
    2,085.28x = 4,092,507.94
  5. Step 5: Solve for x
    x = 4,092,507.94/2,085.28
  6. Step 6: Final answer
    x = 1,962.57

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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.