Home / 1,628.40-2,430.06-1,261.20

Finding the Fourth Proportional to 1,628.40, 2,430.06 and 1,261.20

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Solution

The fourth proportional to 1,628.40, 2,430.06 and 1,261.20 is: 1,882.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.40 : 2,430.06 = 1,261.20 : x
  2. Step 2: Convert to fraction form
    1,628.40/2,430.06 = 1,261.20/x
  3. Step 3: Cross multiply
    1,628.40x = 2,430.06 × 1,261.20
  4. Step 4: Simplify right side
    1,628.40x = 3,064,791.67
  5. Step 5: Solve for x
    x = 3,064,791.67/1,628.40
  6. Step 6: Final answer
    x = 1,882.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.