Home / 1,389,966-1,918,140.12-786,354

Finding the Fourth Proportional to 1,389,966, 1,918,140.12 and 786,354

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Solution

The fourth proportional to 1,389,966, 1,918,140.12 and 786,354 is: 1,085,161.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,966 : 1,918,140.12 = 786,354 : x
  2. Step 2: Convert to fraction form
    1,389,966/1,918,140.12 = 786,354/x
  3. Step 3: Cross multiply
    1,389,966x = 1,918,140.12 × 786,354
  4. Step 4: Simplify right side
    1,389,966x = 1,508,337,155,922.48
  5. Step 5: Solve for x
    x = 1,508,337,155,922.48/1,389,966
  6. Step 6: Final answer
    x = 1,085,161.19

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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.