Home / 1,389,492.55-1,917,533.78-777,640.51

Finding the Fourth Proportional to 1,389,492.55, 1,917,533.78 and 777,640.51

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Solution

The fourth proportional to 1,389,492.55, 1,917,533.78 and 777,640.51 is: 1,073,162.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,492.55 : 1,917,533.78 = 777,640.51 : x
  2. Step 2: Convert to fraction form
    1,389,492.55/1,917,533.78 = 777,640.51/x
  3. Step 3: Cross multiply
    1,389,492.55x = 1,917,533.78 × 777,640.51
  4. Step 4: Simplify right side
    1,389,492.55x = 1,491,151,946,621.43
  5. Step 5: Solve for x
    x = 1,491,151,946,621.43/1,389,492.55
  6. Step 6: Final answer
    x = 1,073,162.97

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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.