Home / 1,289,389.78-1,779,322.71-716,415.22

Finding the Fourth Proportional to 1,289,389.78, 1,779,322.71 and 716,415.22

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Solution

The fourth proportional to 1,289,389.78, 1,779,322.71 and 716,415.22 is: 988,633.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,389.78 : 1,779,322.71 = 716,415.22 : x
  2. Step 2: Convert to fraction form
    1,289,389.78/1,779,322.71 = 716,415.22/x
  3. Step 3: Cross multiply
    1,289,389.78x = 1,779,322.71 × 716,415.22
  4. Step 4: Simplify right side
    1,289,389.78x = 1,274,733,870,735.65
  5. Step 5: Solve for x
    x = 1,274,733,870,735.65/1,289,389.78
  6. Step 6: Final answer
    x = 988,633.45

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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.