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Finding the Fourth Proportional to 287,588.60, 431,382.90 and 163,172.60

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Solution

The fourth proportional to 287,588.60, 431,382.90 and 163,172.60 is: 244,758.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,588.60 : 431,382.90 = 163,172.60 : x
  2. Step 2: Convert to fraction form
    287,588.60/431,382.90 = 163,172.60/x
  3. Step 3: Cross multiply
    287,588.60x = 431,382.90 × 163,172.60
  4. Step 4: Simplify right side
    287,588.60x = 70,389,869,388.54
  5. Step 5: Solve for x
    x = 70,389,869,388.54/287,588.60
  6. Step 6: Final answer
    x = 244,758.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.