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Finding the Fourth Proportional to 1,170,069.15, 1,641,639.75 and 1,170,069.15

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Solution

The fourth proportional to 1,170,069.15, 1,641,639.75 and 1,170,069.15 is: 1,641,639.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170,069.15 : 1,641,639.75 = 1,170,069.15 : x
  2. Step 2: Convert to fraction form
    1,170,069.15/1,641,639.75 = 1,170,069.15/x
  3. Step 3: Cross multiply
    1,170,069.15x = 1,641,639.75 × 1,170,069.15
  4. Step 4: Simplify right side
    1,170,069.15x = 1,920,832,026,888.71
  5. Step 5: Solve for x
    x = 1,920,832,026,888.71/1,170,069.15
  6. Step 6: Final answer
    x = 1,641,639.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.