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Finding the Fourth Proportional to 623,881.80, 860,865.84 and 351,961.56

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Solution

The fourth proportional to 623,881.80, 860,865.84 and 351,961.56 is: 485,655.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,881.80 : 860,865.84 = 351,961.56 : x
  2. Step 2: Convert to fraction form
    623,881.80/860,865.84 = 351,961.56/x
  3. Step 3: Cross multiply
    623,881.80x = 860,865.84 × 351,961.56
  4. Step 4: Simplify right side
    623,881.80x = 302,991,683,997.11
  5. Step 5: Solve for x
    x = 302,991,683,997.11/623,881.80
  6. Step 6: Final answer
    x = 485,655.59

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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.