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Finding the Fourth Proportional to 281,779.36, 388,853.68 and 154,460.32

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Solution

The fourth proportional to 281,779.36, 388,853.68 and 154,460.32 is: 213,154.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,779.36 : 388,853.68 = 154,460.32 : x
  2. Step 2: Convert to fraction form
    281,779.36/388,853.68 = 154,460.32/x
  3. Step 3: Cross multiply
    281,779.36x = 388,853.68 × 154,460.32
  4. Step 4: Simplify right side
    281,779.36x = 60,062,463,845.98
  5. Step 5: Solve for x
    x = 60,062,463,845.98/281,779.36
  6. Step 6: Final answer
    x = 213,154.23

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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.