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Finding the Fourth Proportional to 611,232.80, 916,849.20 and 443,271.20

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Solution

The fourth proportional to 611,232.80, 916,849.20 and 443,271.20 is: 664,906.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,232.80 : 916,849.20 = 443,271.20 : x
  2. Step 2: Convert to fraction form
    611,232.80/916,849.20 = 443,271.20/x
  3. Step 3: Cross multiply
    611,232.80x = 916,849.20 × 443,271.20
  4. Step 4: Simplify right side
    611,232.80x = 406,412,845,103.04
  5. Step 5: Solve for x
    x = 406,412,845,103.04/611,232.80
  6. Step 6: Final answer
    x = 664,906.80

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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.