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Finding the Fourth Proportional to 611,438.20, 916,379.70 and 544,564.60

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Solution

The fourth proportional to 611,438.20, 916,379.70 and 544,564.60 is: 816,154.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,438.20 : 916,379.70 = 544,564.60 : x
  2. Step 2: Convert to fraction form
    611,438.20/916,379.70 = 544,564.60/x
  3. Step 3: Cross multiply
    611,438.20x = 916,379.70 × 544,564.60
  4. Step 4: Simplify right side
    611,438.20x = 499,027,944,778.62
  5. Step 5: Solve for x
    x = 499,027,944,778.62/611,438.20
  6. Step 6: Final answer
    x = 816,154.35

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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.