Home / 643,770.96-888,567.20-439,904.30

Finding the Fourth Proportional to 643,770.96, 888,567.20 and 439,904.30

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Solution

The fourth proportional to 643,770.96, 888,567.20 and 439,904.30 is: 607,179.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,770.96 : 888,567.20 = 439,904.30 : x
  2. Step 2: Convert to fraction form
    643,770.96/888,567.20 = 439,904.30/x
  3. Step 3: Cross multiply
    643,770.96x = 888,567.20 × 439,904.30
  4. Step 4: Simplify right side
    643,770.96x = 390,884,532,118.96
  5. Step 5: Solve for x
    x = 390,884,532,118.96/643,770.96
  6. Step 6: Final answer
    x = 607,179.50

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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.