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Finding the Fourth Proportional to 449,300.24, 618,980.58 and 313,087

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Solution

The fourth proportional to 449,300.24, 618,980.58 and 313,087 is: 431,325.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,300.24 : 618,980.58 = 313,087 : x
  2. Step 2: Convert to fraction form
    449,300.24/618,980.58 = 313,087/x
  3. Step 3: Cross multiply
    449,300.24x = 618,980.58 × 313,087
  4. Step 4: Simplify right side
    449,300.24x = 193,794,772,850.46
  5. Step 5: Solve for x
    x = 193,794,772,850.46/449,300.24
  6. Step 6: Final answer
    x = 431,325.77

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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.