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Finding the Fourth Proportional to 436,657, 654,985.38 and 121,113.94

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Solution

The fourth proportional to 436,657, 654,985.38 and 121,113.94 is: 181,670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,657 : 654,985.38 = 121,113.94 : x
  2. Step 2: Convert to fraction form
    436,657/654,985.38 = 121,113.94/x
  3. Step 3: Cross multiply
    436,657x = 654,985.38 × 121,113.94
  4. Step 4: Simplify right side
    436,657x = 79,327,860,014.20
  5. Step 5: Solve for x
    x = 79,327,860,014.20/436,657
  6. Step 6: Final answer
    x = 181,670.88

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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.