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Finding the Fourth Proportional to 623,620.98, 860,604.81 and 378,534.90

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Solution

The fourth proportional to 623,620.98, 860,604.81 and 378,534.90 is: 522,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,620.98 : 860,604.81 = 378,534.90 : x
  2. Step 2: Convert to fraction form
    623,620.98/860,604.81 = 378,534.90/x
  3. Step 3: Cross multiply
    623,620.98x = 860,604.81 × 378,534.90
  4. Step 4: Simplify right side
    623,620.98x = 325,768,955,692.87
  5. Step 5: Solve for x
    x = 325,768,955,692.87/623,620.98
  6. Step 6: Final answer
    x = 522,382.93

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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.