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Finding the Fourth Proportional to 287,165.54, 396,182.16 and 286,722.68

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Solution

The fourth proportional to 287,165.54, 396,182.16 and 286,722.68 is: 395,571.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,165.54 : 396,182.16 = 286,722.68 : x
  2. Step 2: Convert to fraction form
    287,165.54/396,182.16 = 286,722.68/x
  3. Step 3: Cross multiply
    287,165.54x = 396,182.16 × 286,722.68
  4. Step 4: Simplify right side
    287,165.54x = 113,594,410,683.39
  5. Step 5: Solve for x
    x = 113,594,410,683.39/287,165.54
  6. Step 6: Final answer
    x = 395,571.18

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1.5x scale

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.