Home / 1,821.09-2,513.78-1,075.40

Finding the Fourth Proportional to 1,821.09, 2,513.78 and 1,075.40

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Solution

The fourth proportional to 1,821.09, 2,513.78 and 1,075.40 is: 1,484.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.09 : 2,513.78 = 1,075.40 : x
  2. Step 2: Convert to fraction form
    1,821.09/2,513.78 = 1,075.40/x
  3. Step 3: Cross multiply
    1,821.09x = 2,513.78 × 1,075.40
  4. Step 4: Simplify right side
    1,821.09x = 2,703,319.01
  5. Step 5: Solve for x
    x = 2,703,319.01/1,821.09
  6. Step 6: Final answer
    x = 1,484.45

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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.