Home / 2,215.07-3,056.70-1,206.79

Finding the Fourth Proportional to 2,215.07, 3,056.70 and 1,206.79

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Solution

The fourth proportional to 2,215.07, 3,056.70 and 1,206.79 is: 1,665.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.07 : 3,056.70 = 1,206.79 : x
  2. Step 2: Convert to fraction form
    2,215.07/3,056.70 = 1,206.79/x
  3. Step 3: Cross multiply
    2,215.07x = 3,056.70 × 1,206.79
  4. Step 4: Simplify right side
    2,215.07x = 3,688,794.99
  5. Step 5: Solve for x
    x = 3,688,794.99/2,215.07
  6. Step 6: Final answer
    x = 1,665.32

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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.