Home / 645,991.10-891,459.04-359,511.11

Finding the Fourth Proportional to 645,991.10, 891,459.04 and 359,511.11

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Solution

The fourth proportional to 645,991.10, 891,459.04 and 359,511.11 is: 496,120.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,991.10 : 891,459.04 = 359,511.11 : x
  2. Step 2: Convert to fraction form
    645,991.10/891,459.04 = 359,511.11/x
  3. Step 3: Cross multiply
    645,991.10x = 891,459.04 × 359,511.11
  4. Step 4: Simplify right side
    645,991.10x = 320,489,428,989.93
  5. Step 5: Solve for x
    x = 320,489,428,989.93/645,991.10
  6. Step 6: Final answer
    x = 496,120.50

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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.