Home / 1,485.56-2,228.36-390.08

Finding the Fourth Proportional to 1,485.56, 2,228.36 and 390.08

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Solution

The fourth proportional to 1,485.56, 2,228.36 and 390.08 is: 585.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.56 : 2,228.36 = 390.08 : x
  2. Step 2: Convert to fraction form
    1,485.56/2,228.36 = 390.08/x
  3. Step 3: Cross multiply
    1,485.56x = 2,228.36 × 390.08
  4. Step 4: Simplify right side
    1,485.56x = 869,225.58
  5. Step 5: Solve for x
    x = 869,225.58/1,485.56
  6. Step 6: Final answer
    x = 585.12

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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.