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Finding the Fourth Proportional to 287,361.56, 396,451.74 and 286,918.52

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Solution

The fourth proportional to 287,361.56, 396,451.74 and 286,918.52 is: 395,840.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,361.56 : 396,451.74 = 286,918.52 : x
  2. Step 2: Convert to fraction form
    287,361.56/396,451.74 = 286,918.52/x
  3. Step 3: Cross multiply
    287,361.56x = 396,451.74 × 286,918.52
  4. Step 4: Simplify right side
    287,361.56x = 113,749,346,492.23
  5. Step 5: Solve for x
    x = 113,749,346,492.23/287,361.56
  6. Step 6: Final answer
    x = 395,840.51

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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.