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Finding the Fourth Proportional to 618,902, 854,364.54 and 389,796

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Solution

The fourth proportional to 618,902, 854,364.54 and 389,796 is: 538,094.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,902 : 854,364.54 = 389,796 : x
  2. Step 2: Convert to fraction form
    618,902/854,364.54 = 389,796/x
  3. Step 3: Cross multiply
    618,902x = 854,364.54 × 389,796
  4. Step 4: Simplify right side
    618,902x = 333,027,880,233.84
  5. Step 5: Solve for x
    x = 333,027,880,233.84/618,902
  6. Step 6: Final answer
    x = 538,094.69

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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.