Home / 806,639.57-1,113,128.50-439,109.05

Finding the Fourth Proportional to 806,639.57, 1,113,128.50 and 439,109.05

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Solution

The fourth proportional to 806,639.57, 1,113,128.50 and 439,109.05 is: 605,951.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,639.57 : 1,113,128.50 = 439,109.05 : x
  2. Step 2: Convert to fraction form
    806,639.57/1,113,128.50 = 439,109.05/x
  3. Step 3: Cross multiply
    806,639.57x = 1,113,128.50 × 439,109.05
  4. Step 4: Simplify right side
    806,639.57x = 488,784,801,970.11
  5. Step 5: Solve for x
    x = 488,784,801,970.11/806,639.57
  6. Step 6: Final answer
    x = 605,951.93

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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.