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Finding the Fourth Proportional to 457,485.77, 631,179.14 and 276,128.80

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Solution

The fourth proportional to 457,485.77, 631,179.14 and 276,128.80 is: 380,966.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,485.77 : 631,179.14 = 276,128.80 : x
  2. Step 2: Convert to fraction form
    457,485.77/631,179.14 = 276,128.80/x
  3. Step 3: Cross multiply
    457,485.77x = 631,179.14 × 276,128.80
  4. Step 4: Simplify right side
    457,485.77x = 174,286,735,554.64
  5. Step 5: Solve for x
    x = 174,286,735,554.64/457,485.77
  6. Step 6: Final answer
    x = 380,966.46

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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.