Home / 1,389,967-1,918,141.50-786,355

Finding the Fourth Proportional to 1,389,967, 1,918,141.50 and 786,355

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Solution

The fourth proportional to 1,389,967, 1,918,141.50 and 786,355 is: 1,085,162.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,967 : 1,918,141.50 = 786,355 : x
  2. Step 2: Convert to fraction form
    1,389,967/1,918,141.50 = 786,355/x
  3. Step 3: Cross multiply
    1,389,967x = 1,918,141.50 × 786,355
  4. Step 4: Simplify right side
    1,389,967x = 1,508,340,159,232.50
  5. Step 5: Solve for x
    x = 1,508,340,159,232.50/1,389,967
  6. Step 6: Final answer
    x = 1,085,162.57

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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.