Home / 1,223,986-1,689,259.08-687,442

Finding the Fourth Proportional to 1,223,986, 1,689,259.08 and 687,442

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Solution

The fourth proportional to 1,223,986, 1,689,259.08 and 687,442 is: 948,758.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,986 : 1,689,259.08 = 687,442 : x
  2. Step 2: Convert to fraction form
    1,223,986/1,689,259.08 = 687,442/x
  3. Step 3: Cross multiply
    1,223,986x = 1,689,259.08 × 687,442
  4. Step 4: Simplify right side
    1,223,986x = 1,161,267,640,473.36
  5. Step 5: Solve for x
    x = 1,161,267,640,473.36/1,223,986
  6. Step 6: Final answer
    x = 948,758.92

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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.