Home / 3,130.80-4,319.05-1,803.74

Finding the Fourth Proportional to 3,130.80, 4,319.05 and 1,803.74

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Solution

The fourth proportional to 3,130.80, 4,319.05 and 1,803.74 is: 2,488.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.80 : 4,319.05 = 1,803.74 : x
  2. Step 2: Convert to fraction form
    3,130.80/4,319.05 = 1,803.74/x
  3. Step 3: Cross multiply
    3,130.80x = 4,319.05 × 1,803.74
  4. Step 4: Simplify right side
    3,130.80x = 7,790,443.25
  5. Step 5: Solve for x
    x = 7,790,443.25/3,130.80
  6. Step 6: Final answer
    x = 2,488.32

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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.