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Finding the Fourth Proportional to 570,158,991.78, 786,819,408.82 and 309,398,607.78

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Solution

The fourth proportional to 570,158,991.78, 786,819,408.82 and 309,398,607.78 is: 426,970,078.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,158,991.78 : 786,819,408.82 = 309,398,607.78 : x
  2. Step 2: Convert to fraction form
    570,158,991.78/786,819,408.82 = 309,398,607.78/x
  3. Step 3: Cross multiply
    570,158,991.78x = 786,819,408.82 × 309,398,607.78
  4. Step 4: Simplify right side
    570,158,991.78x = 243,440,829,663,190,656
  5. Step 5: Solve for x
    x = 243,440,829,663,190,656/570,158,991.78
  6. Step 6: Final answer
    x = 426,970,078.83

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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.