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Finding the Fourth Proportional to 660,640, 991,009.44 and 187,363.48

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Solution

The fourth proportional to 660,640, 991,009.44 and 187,363.48 is: 281,059.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,640 : 991,009.44 = 187,363.48 : x
  2. Step 2: Convert to fraction form
    660,640/991,009.44 = 187,363.48/x
  3. Step 3: Cross multiply
    660,640x = 991,009.44 × 187,363.48
  4. Step 4: Simplify right side
    660,640x = 185,678,977,391.25
  5. Step 5: Solve for x
    x = 185,678,977,391.25/660,640
  6. Step 6: Final answer
    x = 281,059.24

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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.