Home / 1,398,078.79-1,929,330.33-786,231.37

Finding the Fourth Proportional to 1,398,078.79, 1,929,330.33 and 786,231.37

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Solution

The fourth proportional to 1,398,078.79, 1,929,330.33 and 786,231.37 is: 1,084,988.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,078.79 : 1,929,330.33 = 786,231.37 : x
  2. Step 2: Convert to fraction form
    1,398,078.79/1,929,330.33 = 786,231.37/x
  3. Step 3: Cross multiply
    1,398,078.79x = 1,929,330.33 × 786,231.37
  4. Step 4: Simplify right side
    1,398,078.79x = 1,516,900,028,538.45
  5. Step 5: Solve for x
    x = 1,516,900,028,538.45/1,398,078.79
  6. Step 6: Final answer
    x = 1,084,988.94

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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.