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Finding the Fourth Proportional to 655,277.20, 982,915.80 and 212,045.20

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Solution

The fourth proportional to 655,277.20, 982,915.80 and 212,045.20 is: 318,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,277.20 : 982,915.80 = 212,045.20 : x
  2. Step 2: Convert to fraction form
    655,277.20/982,915.80 = 212,045.20/x
  3. Step 3: Cross multiply
    655,277.20x = 982,915.80 × 212,045.20
  4. Step 4: Simplify right side
    655,277.20x = 208,422,577,394.16
  5. Step 5: Solve for x
    x = 208,422,577,394.16/655,277.20
  6. Step 6: Final answer
    x = 318,067.80

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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.