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Finding the Fourth Proportional to 655,943.60, 983,915.40 and 212,711.60

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Solution

The fourth proportional to 655,943.60, 983,915.40 and 212,711.60 is: 319,067.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,943.60 : 983,915.40 = 212,711.60 : x
  2. Step 2: Convert to fraction form
    655,943.60/983,915.40 = 212,711.60/x
  3. Step 3: Cross multiply
    655,943.60x = 983,915.40 × 212,711.60
  4. Step 4: Simplify right side
    655,943.60x = 209,290,218,998.64
  5. Step 5: Solve for x
    x = 209,290,218,998.64/655,943.60
  6. Step 6: Final answer
    x = 319,067.40

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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.