Home / 6,289.20-9,431.40-1,905.20

Finding the Fourth Proportional to 6,289.20, 9,431.40 and 1,905.20

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Solution

The fourth proportional to 6,289.20, 9,431.40 and 1,905.20 is: 2,857.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,289.20 : 9,431.40 = 1,905.20 : x
  2. Step 2: Convert to fraction form
    6,289.20/9,431.40 = 1,905.20/x
  3. Step 3: Cross multiply
    6,289.20x = 9,431.40 × 1,905.20
  4. Step 4: Simplify right side
    6,289.20x = 17,968,703.28
  5. Step 5: Solve for x
    x = 17,968,703.28/6,289.20
  6. Step 6: Final answer
    x = 2,857.07

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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.