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Finding the Fourth Proportional to 622,084.14, 858,205.71 and 380,376.78

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Solution

The fourth proportional to 622,084.14, 858,205.71 and 380,376.78 is: 524,754.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,084.14 : 858,205.71 = 380,376.78 : x
  2. Step 2: Convert to fraction form
    622,084.14/858,205.71 = 380,376.78/x
  3. Step 3: Cross multiply
    622,084.14x = 858,205.71 × 380,376.78
  4. Step 4: Simplify right side
    622,084.14x = 326,441,524,547.41
  5. Step 5: Solve for x
    x = 326,441,524,547.41/622,084.14
  6. Step 6: Final answer
    x = 524,754.62

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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.