Home / 2,980.47-4,115.07-1,803.60

Finding the Fourth Proportional to 2,980.47, 4,115.07 and 1,803.60

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Solution

The fourth proportional to 2,980.47, 4,115.07 and 1,803.60 is: 2,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.47 : 4,115.07 = 1,803.60 : x
  2. Step 2: Convert to fraction form
    2,980.47/4,115.07 = 1,803.60/x
  3. Step 3: Cross multiply
    2,980.47x = 4,115.07 × 1,803.60
  4. Step 4: Simplify right side
    2,980.47x = 7,421,940.25
  5. Step 5: Solve for x
    x = 7,421,940.25/2,980.47
  6. Step 6: Final answer
    x = 2,490.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.