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Finding the Fourth Proportional to 1,167,981, 1,611,815.94 and 631,437

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Solution

The fourth proportional to 1,167,981, 1,611,815.94 and 631,437 is: 871,384.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167,981 : 1,611,815.94 = 631,437 : x
  2. Step 2: Convert to fraction form
    1,167,981/1,611,815.94 = 631,437/x
  3. Step 3: Cross multiply
    1,167,981x = 1,611,815.94 × 631,437
  4. Step 4: Simplify right side
    1,167,981x = 1,017,760,221,705.78
  5. Step 5: Solve for x
    x = 1,017,760,221,705.78/1,167,981
  6. Step 6: Final answer
    x = 871,384.23

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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.