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Finding the Fourth Proportional to 1,263,407.91, 1,743,503.58 and 690,448.01

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Solution

The fourth proportional to 1,263,407.91, 1,743,503.58 and 690,448.01 is: 952,818.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263,407.91 : 1,743,503.58 = 690,448.01 : x
  2. Step 2: Convert to fraction form
    1,263,407.91/1,743,503.58 = 690,448.01/x
  3. Step 3: Cross multiply
    1,263,407.91x = 1,743,503.58 × 690,448.01
  4. Step 4: Simplify right side
    1,263,407.91x = 1,203,798,568,521.36
  5. Step 5: Solve for x
    x = 1,203,798,568,521.36/1,263,407.91
  6. Step 6: Final answer
    x = 952,818.61

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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.