Home / 1,390,714.96-1,918,857.72-787,102.96

Finding the Fourth Proportional to 1,390,714.96, 1,918,857.72 and 787,102.96

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Solution

The fourth proportional to 1,390,714.96, 1,918,857.72 and 787,102.96 is: 1,086,015.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,714.96 : 1,918,857.72 = 787,102.96 : x
  2. Step 2: Convert to fraction form
    1,390,714.96/1,918,857.72 = 787,102.96/x
  3. Step 3: Cross multiply
    1,390,714.96x = 1,918,857.72 × 787,102.96
  4. Step 4: Simplify right side
    1,390,714.96x = 1,510,338,591,230.85
  5. Step 5: Solve for x
    x = 1,510,338,591,230.85/1,390,714.96
  6. Step 6: Final answer
    x = 1,086,015.92

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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.