Home / 1,485.66-2,228.48-390.01

Finding the Fourth Proportional to 1,485.66, 2,228.48 and 390.01

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Solution

The fourth proportional to 1,485.66, 2,228.48 and 390.01 is: 585.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.66 : 2,228.48 = 390.01 : x
  2. Step 2: Convert to fraction form
    1,485.66/2,228.48 = 390.01/x
  3. Step 3: Cross multiply
    1,485.66x = 2,228.48 × 390.01
  4. Step 4: Simplify right side
    1,485.66x = 869,116.39
  5. Step 5: Solve for x
    x = 869,116.39/1,485.66
  6. Step 6: Final answer
    x = 585.00

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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.