Home / 812,907.52-1,121,812.23-450,354.94

Finding the Fourth Proportional to 812,907.52, 1,121,812.23 and 450,354.94

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Solution

The fourth proportional to 812,907.52, 1,121,812.23 and 450,354.94 is: 621,489.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,907.52 : 1,121,812.23 = 450,354.94 : x
  2. Step 2: Convert to fraction form
    812,907.52/1,121,812.23 = 450,354.94/x
  3. Step 3: Cross multiply
    812,907.52x = 1,121,812.23 × 450,354.94
  4. Step 4: Simplify right side
    812,907.52x = 505,213,679,532.92
  5. Step 5: Solve for x
    x = 505,213,679,532.92/812,907.52
  6. Step 6: Final answer
    x = 621,489.74

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1.5x scale

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.