Home / 869,087.70-1,303,631.55-420,153.30

Finding the Fourth Proportional to 869,087.70, 1,303,631.55 and 420,153.30

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Solution

The fourth proportional to 869,087.70, 1,303,631.55 and 420,153.30 is: 630,229.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,087.70 : 1,303,631.55 = 420,153.30 : x
  2. Step 2: Convert to fraction form
    869,087.70/1,303,631.55 = 420,153.30/x
  3. Step 3: Cross multiply
    869,087.70x = 1,303,631.55 × 420,153.30
  4. Step 4: Simplify right side
    869,087.70x = 547,725,097,716.62
  5. Step 5: Solve for x
    x = 547,725,097,716.62/869,087.70
  6. Step 6: Final answer
    x = 630,229.95

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Double scale
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Similar ratio
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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.