Home / 2,115.53-2,920.62-1,276.47

Finding the Fourth Proportional to 2,115.53, 2,920.62 and 1,276.47

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Solution

The fourth proportional to 2,115.53, 2,920.62 and 1,276.47 is: 1,762.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.53 : 2,920.62 = 1,276.47 : x
  2. Step 2: Convert to fraction form
    2,115.53/2,920.62 = 1,276.47/x
  3. Step 3: Cross multiply
    2,115.53x = 2,920.62 × 1,276.47
  4. Step 4: Simplify right side
    2,115.53x = 3,728,088.60
  5. Step 5: Solve for x
    x = 3,728,088.60/2,115.53
  6. Step 6: Final answer
    x = 1,762.25

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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.