Home / 287,657.09-431,186.28-161,111.80

Finding the Fourth Proportional to 287,657.09, 431,186.28 and 161,111.80

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Solution

The fourth proportional to 287,657.09, 431,186.28 and 161,111.80 is: 241,500.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,657.09 : 431,186.28 = 161,111.80 : x
  2. Step 2: Convert to fraction form
    287,657.09/431,186.28 = 161,111.80/x
  3. Step 3: Cross multiply
    287,657.09x = 431,186.28 × 161,111.80
  4. Step 4: Simplify right side
    287,657.09x = 69,469,197,706.10
  5. Step 5: Solve for x
    x = 69,469,197,706.10/287,657.09
  6. Step 6: Final answer
    x = 241,500.04

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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.