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Finding the Fourth Proportional to 628,705.14, 943,058 and 207,981

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Solution

The fourth proportional to 628,705.14, 943,058 and 207,981 is: 311,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,705.14 : 943,058 = 207,981 : x
  2. Step 2: Convert to fraction form
    628,705.14/943,058 = 207,981/x
  3. Step 3: Cross multiply
    628,705.14x = 943,058 × 207,981
  4. Step 4: Simplify right side
    628,705.14x = 196,138,145,898
  5. Step 5: Solve for x
    x = 196,138,145,898/628,705.14
  6. Step 6: Final answer
    x = 311,971.60

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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.