Home / 1,188,636.80-1,640,309.12-644,771.28

Finding the Fourth Proportional to 1,188,636.80, 1,640,309.12 and 644,771.28

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Solution

The fourth proportional to 1,188,636.80, 1,640,309.12 and 644,771.28 is: 889,779.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,636.80 : 1,640,309.12 = 644,771.28 : x
  2. Step 2: Convert to fraction form
    1,188,636.80/1,640,309.12 = 644,771.28/x
  3. Step 3: Cross multiply
    1,188,636.80x = 1,640,309.12 × 644,771.28
  4. Step 4: Simplify right side
    1,188,636.80x = 1,057,624,210,898.07
  5. Step 5: Solve for x
    x = 1,057,624,210,898.07/1,188,636.80
  6. Step 6: Final answer
    x = 889,779.12

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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.