Home / 4,220.39-6,328.75-1,621.50

Finding the Fourth Proportional to 4,220.39, 6,328.75 and 1,621.50

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Solution

The fourth proportional to 4,220.39, 6,328.75 and 1,621.50 is: 2,431.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220.39 : 6,328.75 = 1,621.50 : x
  2. Step 2: Convert to fraction form
    4,220.39/6,328.75 = 1,621.50/x
  3. Step 3: Cross multiply
    4,220.39x = 6,328.75 × 1,621.50
  4. Step 4: Simplify right side
    4,220.39x = 10,262,068.13
  5. Step 5: Solve for x
    x = 10,262,068.13/4,220.39
  6. Step 6: Final answer
    x = 2,431.54

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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.