Home / 1,913,213.80-2,640,421.56-1,428,938.56

Finding the Fourth Proportional to 1,913,213.80, 2,640,421.56 and 1,428,938.56

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Solution

The fourth proportional to 1,913,213.80, 2,640,421.56 and 1,428,938.56 is: 1,972,074.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913,213.80 : 2,640,421.56 = 1,428,938.56 : x
  2. Step 2: Convert to fraction form
    1,913,213.80/2,640,421.56 = 1,428,938.56/x
  3. Step 3: Cross multiply
    1,913,213.80x = 2,640,421.56 × 1,428,938.56
  4. Step 4: Simplify right side
    1,913,213.80x = 3,773,000,181,739.35
  5. Step 5: Solve for x
    x = 3,773,000,181,739.35/1,913,213.80
  6. Step 6: Final answer
    x = 1,972,074.52

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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.