Home / 1,389,982-1,918,162.20-786,370

Finding the Fourth Proportional to 1,389,982, 1,918,162.20 and 786,370

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Solution

The fourth proportional to 1,389,982, 1,918,162.20 and 786,370 is: 1,085,183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,982 : 1,918,162.20 = 786,370 : x
  2. Step 2: Convert to fraction form
    1,389,982/1,918,162.20 = 786,370/x
  3. Step 3: Cross multiply
    1,389,982x = 1,918,162.20 × 786,370
  4. Step 4: Simplify right side
    1,389,982x = 1,508,385,209,214
  5. Step 5: Solve for x
    x = 1,508,385,209,214/1,389,982
  6. Step 6: Final answer
    x = 1,085,183.27

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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.