Home / 1,780.70-2,457.68-1,309.28

Finding the Fourth Proportional to 1,780.70, 2,457.68 and 1,309.28

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Solution

The fourth proportional to 1,780.70, 2,457.68 and 1,309.28 is: 1,807.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.70 : 2,457.68 = 1,309.28 : x
  2. Step 2: Convert to fraction form
    1,780.70/2,457.68 = 1,309.28/x
  3. Step 3: Cross multiply
    1,780.70x = 2,457.68 × 1,309.28
  4. Step 4: Simplify right side
    1,780.70x = 3,217,772.44
  5. Step 5: Solve for x
    x = 3,217,772.44/1,780.70
  6. Step 6: Final answer
    x = 1,807.03

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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.