Home / 1,389,977-1,918,155.30-786,365

Finding the Fourth Proportional to 1,389,977, 1,918,155.30 and 786,365

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Solution

The fourth proportional to 1,389,977, 1,918,155.30 and 786,365 is: 1,085,176.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,977 : 1,918,155.30 = 786,365 : x
  2. Step 2: Convert to fraction form
    1,389,977/1,918,155.30 = 786,365/x
  3. Step 3: Cross multiply
    1,389,977x = 1,918,155.30 × 786,365
  4. Step 4: Simplify right side
    1,389,977x = 1,508,370,192,484.50
  5. Step 5: Solve for x
    x = 1,508,370,192,484.50/1,389,977
  6. Step 6: Final answer
    x = 1,085,176.37

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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.