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Finding the Fourth Proportional to 978,776.10, 1,351,185.84 and 656,368.56

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Solution

The fourth proportional to 978,776.10, 1,351,185.84 and 656,368.56 is: 906,107.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,776.10 : 1,351,185.84 = 656,368.56 : x
  2. Step 2: Convert to fraction form
    978,776.10/1,351,185.84 = 656,368.56/x
  3. Step 3: Cross multiply
    978,776.10x = 1,351,185.84 × 656,368.56
  4. Step 4: Simplify right side
    978,776.10x = 886,875,904,093.19
  5. Step 5: Solve for x
    x = 886,875,904,093.19/978,776.10
  6. Step 6: Final answer
    x = 906,107.03

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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.