Home / 1,188,780.81-1,640,516.49-644,916.63

Finding the Fourth Proportional to 1,188,780.81, 1,640,516.49 and 644,916.63

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Solution

The fourth proportional to 1,188,780.81, 1,640,516.49 and 644,916.63 is: 889,984.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,780.81 : 1,640,516.49 = 644,916.63 : x
  2. Step 2: Convert to fraction form
    1,188,780.81/1,640,516.49 = 644,916.63/x
  3. Step 3: Cross multiply
    1,188,780.81x = 1,640,516.49 × 644,916.63
  4. Step 4: Simplify right side
    1,188,780.81x = 1,057,996,357,987.65
  5. Step 5: Solve for x
    x = 1,057,996,357,987.65/1,188,780.81
  6. Step 6: Final answer
    x = 889,984.38

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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.