Home / 1,988,330.81-2,743,798.72-1,128,778.25

Finding the Fourth Proportional to 1,988,330.81, 2,743,798.72 and 1,128,778.25

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Solution

The fourth proportional to 1,988,330.81, 2,743,798.72 and 1,128,778.25 is: 1,557,658.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,330.81 : 2,743,798.72 = 1,128,778.25 : x
  2. Step 2: Convert to fraction form
    1,988,330.81/2,743,798.72 = 1,128,778.25/x
  3. Step 3: Cross multiply
    1,988,330.81x = 2,743,798.72 × 1,128,778.25
  4. Step 4: Simplify right side
    1,988,330.81x = 3,097,140,317,513.84
  5. Step 5: Solve for x
    x = 3,097,140,317,513.84/1,988,330.81
  6. Step 6: Final answer
    x = 1,557,658.47

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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.