Home / 3,130.80-4,320.60-1,804.77

Finding the Fourth Proportional to 3,130.80, 4,320.60 and 1,804.77

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Solution

The fourth proportional to 3,130.80, 4,320.60 and 1,804.77 is: 2,490.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.80 : 4,320.60 = 1,804.77 : x
  2. Step 2: Convert to fraction form
    3,130.80/4,320.60 = 1,804.77/x
  3. Step 3: Cross multiply
    3,130.80x = 4,320.60 × 1,804.77
  4. Step 4: Simplify right side
    3,130.80x = 7,797,689.26
  5. Step 5: Solve for x
    x = 7,797,689.26/3,130.80
  6. Step 6: Final answer
    x = 2,490.64

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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.