Home / 2,075.81-2,864.93-1,290.11

Finding the Fourth Proportional to 2,075.81, 2,864.93 and 1,290.11

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Solution

The fourth proportional to 2,075.81, 2,864.93 and 1,290.11 is: 1,780.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.81 : 2,864.93 = 1,290.11 : x
  2. Step 2: Convert to fraction form
    2,075.81/2,864.93 = 1,290.11/x
  3. Step 3: Cross multiply
    2,075.81x = 2,864.93 × 1,290.11
  4. Step 4: Simplify right side
    2,075.81x = 3,696,054.07
  5. Step 5: Solve for x
    x = 3,696,054.07/2,075.81
  6. Step 6: Final answer
    x = 1,780.54

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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.