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Finding the Fourth Proportional to 710,900.96, 981,041.10 and 388,611.16

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Solution

The fourth proportional to 710,900.96, 981,041.10 and 388,611.16 is: 536,282.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,900.96 : 981,041.10 = 388,611.16 : x
  2. Step 2: Convert to fraction form
    710,900.96/981,041.10 = 388,611.16/x
  3. Step 3: Cross multiply
    710,900.96x = 981,041.10 × 388,611.16
  4. Step 4: Simplify right side
    710,900.96x = 381,243,519,878.68
  5. Step 5: Solve for x
    x = 381,243,519,878.68/710,900.96
  6. Step 6: Final answer
    x = 536,282.18

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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.