Home / 643,811.12-888,622.84-439,944.56

Finding the Fourth Proportional to 643,811.12, 888,622.84 and 439,944.56

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Solution

The fourth proportional to 643,811.12, 888,622.84 and 439,944.56 is: 607,235.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,811.12 : 888,622.84 = 439,944.56 : x
  2. Step 2: Convert to fraction form
    643,811.12/888,622.84 = 439,944.56/x
  3. Step 3: Cross multiply
    643,811.12x = 888,622.84 × 439,944.56
  4. Step 4: Simplify right side
    643,811.12x = 390,944,784,349.75
  5. Step 5: Solve for x
    x = 390,944,784,349.75/643,811.12
  6. Step 6: Final answer
    x = 607,235.22

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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.