Home / 1,215.95-1,823.93-394.21

Finding the Fourth Proportional to 1,215.95, 1,823.93 and 394.21

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Solution

The fourth proportional to 1,215.95, 1,823.93 and 394.21 is: 591.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.95 : 1,823.93 = 394.21 : x
  2. Step 2: Convert to fraction form
    1,215.95/1,823.93 = 394.21/x
  3. Step 3: Cross multiply
    1,215.95x = 1,823.93 × 394.21
  4. Step 4: Simplify right side
    1,215.95x = 719,007.87
  5. Step 5: Solve for x
    x = 719,007.87/1,215.95
  6. Step 6: Final answer
    x = 591.31

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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.