Home / 1,390,554.06-1,918,991.79-907,428.30

Finding the Fourth Proportional to 1,390,554.06, 1,918,991.79 and 907,428.30

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Solution

The fourth proportional to 1,390,554.06, 1,918,991.79 and 907,428.30 is: 1,252,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,554.06 : 1,918,991.79 = 907,428.30 : x
  2. Step 2: Convert to fraction form
    1,390,554.06/1,918,991.79 = 907,428.30/x
  3. Step 3: Cross multiply
    1,390,554.06x = 1,918,991.79 × 907,428.30
  4. Step 4: Simplify right side
    1,390,554.06x = 1,741,347,457,713.66
  5. Step 5: Solve for x
    x = 1,741,347,457,713.66/1,390,554.06
  6. Step 6: Final answer
    x = 1,252,268.80

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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.