Home / 6,405.20-9,607.80-1,788.20

Finding the Fourth Proportional to 6,405.20, 9,607.80 and 1,788.20

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Solution

The fourth proportional to 6,405.20, 9,607.80 and 1,788.20 is: 2,682.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.20 : 9,607.80 = 1,788.20 : x
  2. Step 2: Convert to fraction form
    6,405.20/9,607.80 = 1,788.20/x
  3. Step 3: Cross multiply
    6,405.20x = 9,607.80 × 1,788.20
  4. Step 4: Simplify right side
    6,405.20x = 17,180,667.96
  5. Step 5: Solve for x
    x = 17,180,667.96/6,405.20
  6. Step 6: Final answer
    x = 2,682.30

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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.