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Finding the Fourth Proportional to 611,989.20, 916,234.20 and 549,003.60

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Solution

The fourth proportional to 611,989.20, 916,234.20 and 549,003.60 is: 821,935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,989.20 : 916,234.20 = 549,003.60 : x
  2. Step 2: Convert to fraction form
    611,989.20/916,234.20 = 549,003.60/x
  3. Step 3: Cross multiply
    611,989.20x = 916,234.20 × 549,003.60
  4. Step 4: Simplify right side
    611,989.20x = 503,015,874,243.12
  5. Step 5: Solve for x
    x = 503,015,874,243.12/611,989.20
  6. Step 6: Final answer
    x = 821,935.87

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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.