Home / 1,314.49-1,972.07-390.04

Finding the Fourth Proportional to 1,314.49, 1,972.07 and 390.04

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Solution

The fourth proportional to 1,314.49, 1,972.07 and 390.04 is: 585.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.49 : 1,972.07 = 390.04 : x
  2. Step 2: Convert to fraction form
    1,314.49/1,972.07 = 390.04/x
  3. Step 3: Cross multiply
    1,314.49x = 1,972.07 × 390.04
  4. Step 4: Simplify right side
    1,314.49x = 769,182.23
  5. Step 5: Solve for x
    x = 769,182.23/1,314.49
  6. Step 6: Final answer
    x = 585.16

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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.