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Finding the Fourth Proportional to 1,801.40, 2,485.94 and 1,055.80

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Solution

The fourth proportional to 1,801.40, 2,485.94 and 1,055.80 is: 1,457.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.40 : 2,485.94 = 1,055.80 : x
  2. Step 2: Convert to fraction form
    1,801.40/2,485.94 = 1,055.80/x
  3. Step 3: Cross multiply
    1,801.40x = 2,485.94 × 1,055.80
  4. Step 4: Simplify right side
    1,801.40x = 2,624,655.45
  5. Step 5: Solve for x
    x = 2,624,655.45/1,801.40
  6. Step 6: Final answer
    x = 1,457.01

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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.