Home / 1,389,968-1,918,142.88-786,356

Finding the Fourth Proportional to 1,389,968, 1,918,142.88 and 786,356

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Solution

The fourth proportional to 1,389,968, 1,918,142.88 and 786,356 is: 1,085,163.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,968 : 1,918,142.88 = 786,356 : x
  2. Step 2: Convert to fraction form
    1,389,968/1,918,142.88 = 786,356/x
  3. Step 3: Cross multiply
    1,389,968x = 1,918,142.88 × 786,356
  4. Step 4: Simplify right side
    1,389,968x = 1,508,343,162,545.28
  5. Step 5: Solve for x
    x = 1,508,343,162,545.28/1,389,968
  6. Step 6: Final answer
    x = 1,085,163.95

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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.