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Finding the Fourth Proportional to 655,958,285.44, 905,233,188.48 and 391,663,374.10

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Solution

The fourth proportional to 655,958,285.44, 905,233,188.48 and 391,663,374.10 is: 540,501,877.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,958,285.44 : 905,233,188.48 = 391,663,374.10 : x
  2. Step 2: Convert to fraction form
    655,958,285.44/905,233,188.48 = 391,663,374.10/x
  3. Step 3: Cross multiply
    655,958,285.44x = 905,233,188.48 × 391,663,374.10
  4. Step 4: Simplify right side
    655,958,285.44x = 354,546,684,943,646,272
  5. Step 5: Solve for x
    x = 354,546,684,943,646,272/655,958,285.44
  6. Step 6: Final answer
    x = 540,501,877.66

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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.