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Finding the Fourth Proportional to 281,245.40, 388,109.06 and 160,425.80

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Solution

The fourth proportional to 281,245.40, 388,109.06 and 160,425.80 is: 221,382.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,245.40 : 388,109.06 = 160,425.80 : x
  2. Step 2: Convert to fraction form
    281,245.40/388,109.06 = 160,425.80/x
  3. Step 3: Cross multiply
    281,245.40x = 388,109.06 × 160,425.80
  4. Step 4: Simplify right side
    281,245.40x = 62,262,706,437.75
  5. Step 5: Solve for x
    x = 62,262,706,437.75/281,245.40
  6. Step 6: Final answer
    x = 221,382.13

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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.