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Finding the Fourth Proportional to 442,959,876.40, 664,439,814.60 and 212,873,479.60

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Solution

The fourth proportional to 442,959,876.40, 664,439,814.60 and 212,873,479.60 is: 319,310,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,959,876.40 : 664,439,814.60 = 212,873,479.60 : x
  2. Step 2: Convert to fraction form
    442,959,876.40/664,439,814.60 = 212,873,479.60/x
  3. Step 3: Cross multiply
    442,959,876.40x = 664,439,814.60 × 212,873,479.60
  4. Step 4: Simplify right side
    442,959,876.40x = 141,441,615,318,680,880
  5. Step 5: Solve for x
    x = 141,441,615,318,680,880/442,959,876.40
  6. Step 6: Final answer
    x = 319,310,219.40

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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.