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Finding the Fourth Proportional to 1,159,890.03, 1,600,644.90 and 643,721.82

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Solution

The fourth proportional to 1,159,890.03, 1,600,644.90 and 643,721.82 is: 888,334.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159,890.03 : 1,600,644.90 = 643,721.82 : x
  2. Step 2: Convert to fraction form
    1,159,890.03/1,600,644.90 = 643,721.82/x
  3. Step 3: Cross multiply
    1,159,890.03x = 1,600,644.90 × 643,721.82
  4. Step 4: Simplify right side
    1,159,890.03x = 1,030,370,048,201.72
  5. Step 5: Solve for x
    x = 1,030,370,048,201.72/1,159,890.03
  6. Step 6: Final answer
    x = 888,334.26

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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.