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Finding the Fourth Proportional to 1,390,523, 1,918,921.74 and 754,619

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Solution

The fourth proportional to 1,390,523, 1,918,921.74 and 754,619 is: 1,041,374.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,523 : 1,918,921.74 = 754,619 : x
  2. Step 2: Convert to fraction form
    1,390,523/1,918,921.74 = 754,619/x
  3. Step 3: Cross multiply
    1,390,523x = 1,918,921.74 × 754,619
  4. Step 4: Simplify right side
    1,390,523x = 1,448,054,804,517.06
  5. Step 5: Solve for x
    x = 1,448,054,804,517.06/1,390,523
  6. Step 6: Final answer
    x = 1,041,374.22

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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.