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Finding the Fourth Proportional to 618,990, 854,219.16 and 350,718

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Solution

The fourth proportional to 618,990, 854,219.16 and 350,718 is: 483,998.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,990 : 854,219.16 = 350,718 : x
  2. Step 2: Convert to fraction form
    618,990/854,219.16 = 350,718/x
  3. Step 3: Cross multiply
    618,990x = 854,219.16 × 350,718
  4. Step 4: Simplify right side
    618,990x = 299,590,035,356.88
  5. Step 5: Solve for x
    x = 299,590,035,356.88/618,990
  6. Step 6: Final answer
    x = 483,998.18

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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.