Home / 4,291.60-6,436.36-1,980.88

Finding the Fourth Proportional to 4,291.60, 6,436.36 and 1,980.88

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Solution

The fourth proportional to 4,291.60, 6,436.36 and 1,980.88 is: 2,970.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,291.60 : 6,436.36 = 1,980.88 : x
  2. Step 2: Convert to fraction form
    4,291.60/6,436.36 = 1,980.88/x
  3. Step 3: Cross multiply
    4,291.60x = 6,436.36 × 1,980.88
  4. Step 4: Simplify right side
    4,291.60x = 12,749,656.80
  5. Step 5: Solve for x
    x = 12,749,656.80/4,291.60
  6. Step 6: Final answer
    x = 2,970.84

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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.