Home / 645,986.87-891,453.18-359,506.88

Finding the Fourth Proportional to 645,986.87, 891,453.18 and 359,506.88

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Solution

The fourth proportional to 645,986.87, 891,453.18 and 359,506.88 is: 496,114.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,986.87 : 891,453.18 = 359,506.88 : x
  2. Step 2: Convert to fraction form
    645,986.87/891,453.18 = 359,506.88/x
  3. Step 3: Cross multiply
    645,986.87x = 891,453.18 × 359,506.88
  4. Step 4: Simplify right side
    645,986.87x = 320,483,551,407.88
  5. Step 5: Solve for x
    x = 320,483,551,407.88/645,986.87
  6. Step 6: Final answer
    x = 496,114.65

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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.