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Finding the Fourth Proportional to 611,372.80, 917,059.20 and 453,908.80

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Solution

The fourth proportional to 611,372.80, 917,059.20 and 453,908.80 is: 680,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,372.80 : 917,059.20 = 453,908.80 : x
  2. Step 2: Convert to fraction form
    611,372.80/917,059.20 = 453,908.80/x
  3. Step 3: Cross multiply
    611,372.80x = 917,059.20 × 453,908.80
  4. Step 4: Simplify right side
    611,372.80x = 416,261,241,000.96
  5. Step 5: Solve for x
    x = 416,261,241,000.96/611,372.80
  6. Step 6: Final answer
    x = 680,863.20

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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.