Home / 1,370.84-2,065.72-1,240.88

Finding the Fourth Proportional to 1,370.84, 2,065.72 and 1,240.88

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Solution

The fourth proportional to 1,370.84, 2,065.72 and 1,240.88 is: 1,869.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.84 : 2,065.72 = 1,240.88 : x
  2. Step 2: Convert to fraction form
    1,370.84/2,065.72 = 1,240.88/x
  3. Step 3: Cross multiply
    1,370.84x = 2,065.72 × 1,240.88
  4. Step 4: Simplify right side
    1,370.84x = 2,563,310.63
  5. Step 5: Solve for x
    x = 2,563,310.63/1,370.84
  6. Step 6: Final answer
    x = 1,869.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.