Home / 4,319.20-6,478.80-4,129.60

Finding the Fourth Proportional to 4,319.20, 6,478.80 and 4,129.60

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Solution

The fourth proportional to 4,319.20, 6,478.80 and 4,129.60 is: 6,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,319.20 : 6,478.80 = 4,129.60 : x
  2. Step 2: Convert to fraction form
    4,319.20/6,478.80 = 4,129.60/x
  3. Step 3: Cross multiply
    4,319.20x = 6,478.80 × 4,129.60
  4. Step 4: Simplify right side
    4,319.20x = 26,754,852.48
  5. Step 5: Solve for x
    x = 26,754,852.48/4,319.20
  6. Step 6: Final answer
    x = 6,194.40

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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.