Home / 521,785,989.60-782,678,984.40-214,920,146.40

Finding the Fourth Proportional to 521,785,989.60, 782,678,984.40 and 214,920,146.40

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Solution

The fourth proportional to 521,785,989.60, 782,678,984.40 and 214,920,146.40 is: 322,380,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,785,989.60 : 782,678,984.40 = 214,920,146.40 : x
  2. Step 2: Convert to fraction form
    521,785,989.60/782,678,984.40 = 214,920,146.40/x
  3. Step 3: Cross multiply
    521,785,989.60x = 782,678,984.40 × 214,920,146.40
  4. Step 4: Simplify right side
    521,785,989.60x = 168,213,481,911,451,328
  5. Step 5: Solve for x
    x = 168,213,481,911,451,328/521,785,989.60
  6. Step 6: Final answer
    x = 322,380,219.60

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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.