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Finding the Fourth Proportional to 611,321.60, 916,982.40 and 387,372.80

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Solution

The fourth proportional to 611,321.60, 916,982.40 and 387,372.80 is: 581,059.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,321.60 : 916,982.40 = 387,372.80 : x
  2. Step 2: Convert to fraction form
    611,321.60/916,982.40 = 387,372.80/x
  3. Step 3: Cross multiply
    611,321.60x = 916,982.40 × 387,372.80
  4. Step 4: Simplify right side
    611,321.60x = 355,214,039,838.72
  5. Step 5: Solve for x
    x = 355,214,039,838.72/611,321.60
  6. Step 6: Final answer
    x = 581,059.20

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Similar ratio
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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.