Home / 1,218,261.78-1,681,221.14-666,968.25

Finding the Fourth Proportional to 1,218,261.78, 1,681,221.14 and 666,968.25

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Solution

The fourth proportional to 1,218,261.78, 1,681,221.14 and 666,968.25 is: 920,427.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,261.78 : 1,681,221.14 = 666,968.25 : x
  2. Step 2: Convert to fraction form
    1,218,261.78/1,681,221.14 = 666,968.25/x
  3. Step 3: Cross multiply
    1,218,261.78x = 1,681,221.14 × 666,968.25
  4. Step 4: Simplify right side
    1,218,261.78x = 1,121,321,121,608.81
  5. Step 5: Solve for x
    x = 1,121,321,121,608.81/1,218,261.78
  6. Step 6: Final answer
    x = 920,427.07

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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.