Home / 1,210,439.86-1,669,846.20-780,858.40

Finding the Fourth Proportional to 1,210,439.86, 1,669,846.20 and 780,858.40

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Solution

The fourth proportional to 1,210,439.86, 1,669,846.20 and 780,858.40 is: 1,077,222.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,439.86 : 1,669,846.20 = 780,858.40 : x
  2. Step 2: Convert to fraction form
    1,210,439.86/1,669,846.20 = 780,858.40/x
  3. Step 3: Cross multiply
    1,210,439.86x = 1,669,846.20 × 780,858.40
  4. Step 4: Simplify right side
    1,210,439.86x = 1,303,913,431,978.08
  5. Step 5: Solve for x
    x = 1,303,913,431,978.08/1,210,439.86
  6. Step 6: Final answer
    x = 1,077,222.81

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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.