Home / 1,370.69-2,065.21-1,240.84

Finding the Fourth Proportional to 1,370.69, 2,065.21 and 1,240.84

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Solution

The fourth proportional to 1,370.69, 2,065.21 and 1,240.84 is: 1,869.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.69 : 2,065.21 = 1,240.84 : x
  2. Step 2: Convert to fraction form
    1,370.69/2,065.21 = 1,240.84/x
  3. Step 3: Cross multiply
    1,370.69x = 2,065.21 × 1,240.84
  4. Step 4: Simplify right side
    1,370.69x = 2,562,595.18
  5. Step 5: Solve for x
    x = 2,562,595.18/1,370.69
  6. Step 6: Final answer
    x = 1,869.57

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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.