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Finding the Fourth Proportional to 455,639.49, 628,783.79 and 251,686.35

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Solution

The fourth proportional to 455,639.49, 628,783.79 and 251,686.35 is: 347,327.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,639.49 : 628,783.79 = 251,686.35 : x
  2. Step 2: Convert to fraction form
    455,639.49/628,783.79 = 251,686.35/x
  3. Step 3: Cross multiply
    455,639.49x = 628,783.79 × 251,686.35
  4. Step 4: Simplify right side
    455,639.49x = 158,256,295,785.84
  5. Step 5: Solve for x
    x = 158,256,295,785.84/455,639.49
  6. Step 6: Final answer
    x = 347,327.87

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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.