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Finding the Fourth Proportional to 501,911.72, 692,639.36 and 275,571.80

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Solution

The fourth proportional to 501,911.72, 692,639.36 and 275,571.80 is: 380,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,911.72 : 692,639.36 = 275,571.80 : x
  2. Step 2: Convert to fraction form
    501,911.72/692,639.36 = 275,571.80/x
  3. Step 3: Cross multiply
    501,911.72x = 692,639.36 × 275,571.80
  4. Step 4: Simplify right side
    501,911.72x = 190,871,875,186.05
  5. Step 5: Solve for x
    x = 190,871,875,186.05/501,911.72
  6. Step 6: Final answer
    x = 380,289.74

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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.