Home / 680,005.60-1,017,934.80-398,687.20

Finding the Fourth Proportional to 680,005.60, 1,017,934.80 and 398,687.20

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Solution

The fourth proportional to 680,005.60, 1,017,934.80 and 398,687.20 is: 596,815.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,005.60 : 1,017,934.80 = 398,687.20 : x
  2. Step 2: Convert to fraction form
    680,005.60/1,017,934.80 = 398,687.20/x
  3. Step 3: Cross multiply
    680,005.60x = 1,017,934.80 × 398,687.20
  4. Step 4: Simplify right side
    680,005.60x = 405,837,575,194.56
  5. Step 5: Solve for x
    x = 405,837,575,194.56/680,005.60
  6. Step 6: Final answer
    x = 596,815.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.