Home / 1,388,953.80-2,083,430.70-1,238,378.85

Finding the Fourth Proportional to 1,388,953.80, 2,083,430.70 and 1,238,378.85

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Solution

The fourth proportional to 1,388,953.80, 2,083,430.70 and 1,238,378.85 is: 1,857,568.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,953.80 : 2,083,430.70 = 1,238,378.85 : x
  2. Step 2: Convert to fraction form
    1,388,953.80/2,083,430.70 = 1,238,378.85/x
  3. Step 3: Cross multiply
    1,388,953.80x = 2,083,430.70 × 1,238,378.85
  4. Step 4: Simplify right side
    1,388,953.80x = 2,580,076,514,320.70
  5. Step 5: Solve for x
    x = 2,580,076,514,320.70/1,388,953.80
  6. Step 6: Final answer
    x = 1,857,568.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.