Home / 3,130.81-4,320.62-1,804.57

Finding the Fourth Proportional to 3,130.81, 4,320.62 and 1,804.57

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Solution

The fourth proportional to 3,130.81, 4,320.62 and 1,804.57 is: 2,490.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.81 : 4,320.62 = 1,804.57 : x
  2. Step 2: Convert to fraction form
    3,130.81/4,320.62 = 1,804.57/x
  3. Step 3: Cross multiply
    3,130.81x = 4,320.62 × 1,804.57
  4. Step 4: Simplify right side
    3,130.81x = 7,796,861.23
  5. Step 5: Solve for x
    x = 7,796,861.23/3,130.81
  6. Step 6: Final answer
    x = 2,490.37

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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.