Home / 1,605.10-2,215.47-1,257.34

Finding the Fourth Proportional to 1,605.10, 2,215.47 and 1,257.34

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Solution

The fourth proportional to 1,605.10, 2,215.47 and 1,257.34 is: 1,735.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.10 : 2,215.47 = 1,257.34 : x
  2. Step 2: Convert to fraction form
    1,605.10/2,215.47 = 1,257.34/x
  3. Step 3: Cross multiply
    1,605.10x = 2,215.47 × 1,257.34
  4. Step 4: Simplify right side
    1,605.10x = 2,785,599.05
  5. Step 5: Solve for x
    x = 2,785,599.05/1,605.10
  6. Step 6: Final answer
    x = 1,735.47

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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.