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Finding the Fourth Proportional to 1,886.15, 2,829.52 and 912.32

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Solution

The fourth proportional to 1,886.15, 2,829.52 and 912.32 is: 1,368.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.15 : 2,829.52 = 912.32 : x
  2. Step 2: Convert to fraction form
    1,886.15/2,829.52 = 912.32/x
  3. Step 3: Cross multiply
    1,886.15x = 2,829.52 × 912.32
  4. Step 4: Simplify right side
    1,886.15x = 2,581,427.69
  5. Step 5: Solve for x
    x = 2,581,427.69/1,886.15
  6. Step 6: Final answer
    x = 1,368.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.