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Finding the Fourth Proportional to 3,130.99, 4,320.61 and 1,804.61

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Solution

The fourth proportional to 3,130.99, 4,320.61 and 1,804.61 is: 2,490.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.99 : 4,320.61 = 1,804.61 : x
  2. Step 2: Convert to fraction form
    3,130.99/4,320.61 = 1,804.61/x
  3. Step 3: Cross multiply
    3,130.99x = 4,320.61 × 1,804.61
  4. Step 4: Simplify right side
    3,130.99x = 7,797,022.30
  5. Step 5: Solve for x
    x = 7,797,022.30/3,130.99
  6. Step 6: Final answer
    x = 2,490.28

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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.