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Finding the Fourth Proportional to 281,686.17, 388,733.67 and 154,368.75

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Solution

The fourth proportional to 281,686.17, 388,733.67 and 154,368.75 is: 213,032.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,686.17 : 388,733.67 = 154,368.75 : x
  2. Step 2: Convert to fraction form
    281,686.17/388,733.67 = 154,368.75/x
  3. Step 3: Cross multiply
    281,686.17x = 388,733.67 × 154,368.75
  4. Step 4: Simplify right side
    281,686.17x = 60,008,330,720.81
  5. Step 5: Solve for x
    x = 60,008,330,720.81/281,686.17
  6. Step 6: Final answer
    x = 213,032.58

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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.