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Finding the Fourth Proportional to 287,874.40, 397,268.40 and 160,558.20

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Solution

The fourth proportional to 287,874.40, 397,268.40 and 160,558.20 is: 221,571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,874.40 : 397,268.40 = 160,558.20 : x
  2. Step 2: Convert to fraction form
    287,874.40/397,268.40 = 160,558.20/x
  3. Step 3: Cross multiply
    287,874.40x = 397,268.40 × 160,558.20
  4. Step 4: Simplify right side
    287,874.40x = 63,784,699,220.88
  5. Step 5: Solve for x
    x = 63,784,699,220.88/287,874.40
  6. Step 6: Final answer
    x = 221,571.28

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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.