Home / 1,728.04-2,383.12-1,138.36

Finding the Fourth Proportional to 1,728.04, 2,383.12 and 1,138.36

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Solution

The fourth proportional to 1,728.04, 2,383.12 and 1,138.36 is: 1,569.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.04 : 2,383.12 = 1,138.36 : x
  2. Step 2: Convert to fraction form
    1,728.04/2,383.12 = 1,138.36/x
  3. Step 3: Cross multiply
    1,728.04x = 2,383.12 × 1,138.36
  4. Step 4: Simplify right side
    1,728.04x = 2,712,848.48
  5. Step 5: Solve for x
    x = 2,712,848.48/1,728.04
  6. Step 6: Final answer
    x = 1,569.90

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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.