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Finding the Fourth Proportional to 390,848.42, 539,325.42 and 218,775.97

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Solution

The fourth proportional to 390,848.42, 539,325.42 and 218,775.97 is: 301,885.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,848.42 : 539,325.42 = 218,775.97 : x
  2. Step 2: Convert to fraction form
    390,848.42/539,325.42 = 218,775.97/x
  3. Step 3: Cross multiply
    390,848.42x = 539,325.42 × 218,775.97
  4. Step 4: Simplify right side
    390,848.42x = 117,991,441,906.16
  5. Step 5: Solve for x
    x = 117,991,441,906.16/390,848.42
  6. Step 6: Final answer
    x = 301,885.43

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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.