Home / 2,120.71-2,927.08-1,281.45

Finding the Fourth Proportional to 2,120.71, 2,927.08 and 1,281.45

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Solution

The fourth proportional to 2,120.71, 2,927.08 and 1,281.45 is: 1,768.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.71 : 2,927.08 = 1,281.45 : x
  2. Step 2: Convert to fraction form
    2,120.71/2,927.08 = 1,281.45/x
  3. Step 3: Cross multiply
    2,120.71x = 2,927.08 × 1,281.45
  4. Step 4: Simplify right side
    2,120.71x = 3,750,889.59
  5. Step 5: Solve for x
    x = 3,750,889.59/2,120.71
  6. Step 6: Final answer
    x = 1,768.70

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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.