Home / 4,279.60-6,420.64-2,089.60

Finding the Fourth Proportional to 4,279.60, 6,420.64 and 2,089.60

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Solution

The fourth proportional to 4,279.60, 6,420.64 and 2,089.60 is: 3,135.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.60 : 6,420.64 = 2,089.60 : x
  2. Step 2: Convert to fraction form
    4,279.60/6,420.64 = 2,089.60/x
  3. Step 3: Cross multiply
    4,279.60x = 6,420.64 × 2,089.60
  4. Step 4: Simplify right side
    4,279.60x = 13,416,569.34
  5. Step 5: Solve for x
    x = 13,416,569.34/4,279.60
  6. Step 6: Final answer
    x = 3,135.01

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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.