Home / 812,129.04-1,120,740.64-439,591.92

Finding the Fourth Proportional to 812,129.04, 1,120,740.64 and 439,591.92

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Solution

The fourth proportional to 812,129.04, 1,120,740.64 and 439,591.92 is: 606,638.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,129.04 : 1,120,740.64 = 439,591.92 : x
  2. Step 2: Convert to fraction form
    812,129.04/1,120,740.64 = 439,591.92/x
  3. Step 3: Cross multiply
    812,129.04x = 1,120,740.64 × 439,591.92
  4. Step 4: Simplify right side
    812,129.04x = 492,668,529,759.63
  5. Step 5: Solve for x
    x = 492,668,529,759.63/812,129.04
  6. Step 6: Final answer
    x = 606,638.24

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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.