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Finding the Fourth Proportional to 570,245,892.39, 786,939,651.68 and 309,485,508.39

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Solution

The fourth proportional to 570,245,892.39, 786,939,651.68 and 309,485,508.39 is: 427,090,175.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,245,892.39 : 786,939,651.68 = 309,485,508.39 : x
  2. Step 2: Convert to fraction form
    570,245,892.39/786,939,651.68 = 309,485,508.39/x
  3. Step 3: Cross multiply
    570,245,892.39x = 786,939,651.68 × 309,485,508.39
  4. Step 4: Simplify right side
    570,245,892.39x = 243,546,418,170,886,880
  5. Step 5: Solve for x
    x = 243,546,418,170,886,880/570,245,892.39
  6. Step 6: Final answer
    x = 427,090,175.35

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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.