Home / 1,485.88-2,228.85-390.22

Finding the Fourth Proportional to 1,485.88, 2,228.85 and 390.22

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Solution

The fourth proportional to 1,485.88, 2,228.85 and 390.22 is: 585.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.88 : 2,228.85 = 390.22 : x
  2. Step 2: Convert to fraction form
    1,485.88/2,228.85 = 390.22/x
  3. Step 3: Cross multiply
    1,485.88x = 2,228.85 × 390.22
  4. Step 4: Simplify right side
    1,485.88x = 869,736.27
  5. Step 5: Solve for x
    x = 869,736.27/1,485.88
  6. Step 6: Final answer
    x = 585.34

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1.5x scale

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.