Home / 1,390,713.96-1,918,856.34-787,101.96

Finding the Fourth Proportional to 1,390,713.96, 1,918,856.34 and 787,101.96

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Solution

The fourth proportional to 1,390,713.96, 1,918,856.34 and 787,101.96 is: 1,086,014.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,713.96 : 1,918,856.34 = 787,101.96 : x
  2. Step 2: Convert to fraction form
    1,390,713.96/1,918,856.34 = 787,101.96/x
  3. Step 3: Cross multiply
    1,390,713.96x = 1,918,856.34 × 787,101.96
  4. Step 4: Simplify right side
    1,390,713.96x = 1,510,335,586,172.43
  5. Step 5: Solve for x
    x = 1,510,335,586,172.43/1,390,713.96
  6. Step 6: Final answer
    x = 1,086,014.54

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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.