Home / 1,389,971-1,918,147.02-786,359

Finding the Fourth Proportional to 1,389,971, 1,918,147.02 and 786,359

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Solution

The fourth proportional to 1,389,971, 1,918,147.02 and 786,359 is: 1,085,168.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,971 : 1,918,147.02 = 786,359 : x
  2. Step 2: Convert to fraction form
    1,389,971/1,918,147.02 = 786,359/x
  3. Step 3: Cross multiply
    1,389,971x = 1,918,147.02 × 786,359
  4. Step 4: Simplify right side
    1,389,971x = 1,508,352,172,500.18
  5. Step 5: Solve for x
    x = 1,508,352,172,500.18/1,389,971
  6. Step 6: Final answer
    x = 1,085,168.09

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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.