Home / 415,043,998.20-621,894,150.90-261,415,121.40

Finding the Fourth Proportional to 415,043,998.20, 621,894,150.90 and 261,415,121.40

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Solution

The fourth proportional to 415,043,998.20, 621,894,150.90 and 261,415,121.40 is: 391,699,520.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,043,998.20 : 621,894,150.90 = 261,415,121.40 : x
  2. Step 2: Convert to fraction form
    415,043,998.20/621,894,150.90 = 261,415,121.40/x
  3. Step 3: Cross multiply
    415,043,998.20x = 621,894,150.90 × 261,415,121.40
  4. Step 4: Simplify right side
    415,043,998.20x = 162,572,534,955,473,408
  5. Step 5: Solve for x
    x = 162,572,534,955,473,408/415,043,998.20
  6. Step 6: Final answer
    x = 391,699,520.20

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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.