Home / 1,801.65-2,485.28-1,129.31

Finding the Fourth Proportional to 1,801.65, 2,485.28 and 1,129.31

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Solution

The fourth proportional to 1,801.65, 2,485.28 and 1,129.31 is: 1,557.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.65 : 2,485.28 = 1,129.31 : x
  2. Step 2: Convert to fraction form
    1,801.65/2,485.28 = 1,129.31/x
  3. Step 3: Cross multiply
    1,801.65x = 2,485.28 × 1,129.31
  4. Step 4: Simplify right side
    1,801.65x = 2,806,651.27
  5. Step 5: Solve for x
    x = 2,806,651.27/1,801.65
  6. Step 6: Final answer
    x = 1,557.82

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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.