Home / 212,607,076.80-318,910,615.20-208,575,998.40

Finding the Fourth Proportional to 212,607,076.80, 318,910,615.20 and 208,575,998.40

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Solution

The fourth proportional to 212,607,076.80, 318,910,615.20 and 208,575,998.40 is: 312,863,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,607,076.80 : 318,910,615.20 = 208,575,998.40 : x
  2. Step 2: Convert to fraction form
    212,607,076.80/318,910,615.20 = 208,575,998.40/x
  3. Step 3: Cross multiply
    212,607,076.80x = 318,910,615.20 × 208,575,998.40
  4. Step 4: Simplify right side
    212,607,076.80x = 66,517,099,965,698,216
  5. Step 5: Solve for x
    x = 66,517,099,965,698,216/212,607,076.80
  6. Step 6: Final answer
    x = 312,863,997.60

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1.5x scale

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.