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Finding the Fourth Proportional to 773,909.70, 1,157,861.06 and 678,421.64

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Solution

The fourth proportional to 773,909.70, 1,157,861.06 and 678,421.64 is: 1,014,999.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    773,909.70 : 1,157,861.06 = 678,421.64 : x
  2. Step 2: Convert to fraction form
    773,909.70/1,157,861.06 = 678,421.64/x
  3. Step 3: Cross multiply
    773,909.70x = 1,157,861.06 × 678,421.64
  4. Step 4: Simplify right side
    773,909.70x = 785,517,990,035.93
  5. Step 5: Solve for x
    x = 785,517,990,035.93/773,909.70
  6. Step 6: Final answer
    x = 1,014,999.54

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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.