Home / 689,286.60-1,033,962.30-215,987.40

Finding the Fourth Proportional to 689,286.60, 1,033,962.30 and 215,987.40

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Solution

The fourth proportional to 689,286.60, 1,033,962.30 and 215,987.40 is: 323,991.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,286.60 : 1,033,962.30 = 215,987.40 : x
  2. Step 2: Convert to fraction form
    689,286.60/1,033,962.30 = 215,987.40/x
  3. Step 3: Cross multiply
    689,286.60x = 1,033,962.30 × 215,987.40
  4. Step 4: Simplify right side
    689,286.60x = 223,322,828,875.02
  5. Step 5: Solve for x
    x = 223,322,828,875.02/689,286.60
  6. Step 6: Final answer
    x = 323,991.25

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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.