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Finding the Fourth Proportional to 572,910,950.40, 790,606,404 and 318,607,902.60

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Solution

The fourth proportional to 572,910,950.40, 790,606,404 and 318,607,902.60 is: 439,672,950.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,910,950.40 : 790,606,404 = 318,607,902.60 : x
  2. Step 2: Convert to fraction form
    572,910,950.40/790,606,404 = 318,607,902.60/x
  3. Step 3: Cross multiply
    572,910,950.40x = 790,606,404 × 318,607,902.60
  4. Step 4: Simplify right side
    572,910,950.40x = 251,893,448,160,568,256
  5. Step 5: Solve for x
    x = 251,893,448,160,568,256/572,910,950.40
  6. Step 6: Final answer
    x = 439,672,950.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.