Home / 1,312.73-1,968.78-388.04

Finding the Fourth Proportional to 1,312.73, 1,968.78 and 388.04

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Solution

The fourth proportional to 1,312.73, 1,968.78 and 388.04 is: 581.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.73 : 1,968.78 = 388.04 : x
  2. Step 2: Convert to fraction form
    1,312.73/1,968.78 = 388.04/x
  3. Step 3: Cross multiply
    1,312.73x = 1,968.78 × 388.04
  4. Step 4: Simplify right side
    1,312.73x = 763,965.39
  5. Step 5: Solve for x
    x = 763,965.39/1,312.73
  6. Step 6: Final answer
    x = 581.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.