Home / 1,485.63-2,228.46-390.10

Finding the Fourth Proportional to 1,485.63, 2,228.46 and 390.10

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Solution

The fourth proportional to 1,485.63, 2,228.46 and 390.10 is: 585.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.63 : 2,228.46 = 390.10 : x
  2. Step 2: Convert to fraction form
    1,485.63/2,228.46 = 390.10/x
  3. Step 3: Cross multiply
    1,485.63x = 2,228.46 × 390.10
  4. Step 4: Simplify right side
    1,485.63x = 869,322.25
  5. Step 5: Solve for x
    x = 869,322.25/1,485.63
  6. Step 6: Final answer
    x = 585.15

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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.