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Finding the Fourth Proportional to 812,915.08, 1,121,811 and 450,338.32

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Solution

The fourth proportional to 812,915.08, 1,121,811 and 450,338.32 is: 621,460.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,915.08 : 1,121,811 = 450,338.32 : x
  2. Step 2: Convert to fraction form
    812,915.08/1,121,811 = 450,338.32/x
  3. Step 3: Cross multiply
    812,915.08x = 1,121,811 × 450,338.32
  4. Step 4: Simplify right side
    812,915.08x = 505,194,481,097.52
  5. Step 5: Solve for x
    x = 505,194,481,097.52/812,915.08
  6. Step 6: Final answer
    x = 621,460.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.