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Finding the Fourth Proportional to 611,562.20, 916,905.90 and 274,326.80

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Solution

The fourth proportional to 611,562.20, 916,905.90 and 274,326.80 is: 411,294.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,562.20 : 916,905.90 = 274,326.80 : x
  2. Step 2: Convert to fraction form
    611,562.20/916,905.90 = 274,326.80/x
  3. Step 3: Cross multiply
    611,562.20x = 916,905.90 × 274,326.80
  4. Step 4: Simplify right side
    611,562.20x = 251,531,861,448.12
  5. Step 5: Solve for x
    x = 251,531,861,448.12/611,562.20
  6. Step 6: Final answer
    x = 411,294.00

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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.