Home / 645,191.88-890,314.12-358,694.52

Finding the Fourth Proportional to 645,191.88, 890,314.12 and 358,694.52

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Solution

The fourth proportional to 645,191.88, 890,314.12 and 358,694.52 is: 494,970.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,191.88 : 890,314.12 = 358,694.52 : x
  2. Step 2: Convert to fraction form
    645,191.88/890,314.12 = 358,694.52/x
  3. Step 3: Cross multiply
    645,191.88x = 890,314.12 × 358,694.52
  4. Step 4: Simplify right side
    645,191.88x = 319,350,795,922.62
  5. Step 5: Solve for x
    x = 319,350,795,922.62/645,191.88
  6. Step 6: Final answer
    x = 494,970.27

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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.