Home / 769,311.84-1,061,653.58-420,459.28

Finding the Fourth Proportional to 769,311.84, 1,061,653.58 and 420,459.28

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Solution

The fourth proportional to 769,311.84, 1,061,653.58 and 420,459.28 is: 580,235.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,311.84 : 1,061,653.58 = 420,459.28 : x
  2. Step 2: Convert to fraction form
    769,311.84/1,061,653.58 = 420,459.28/x
  3. Step 3: Cross multiply
    769,311.84x = 1,061,653.58 × 420,459.28
  4. Step 4: Simplify right side
    769,311.84x = 446,382,099,856.22
  5. Step 5: Solve for x
    x = 446,382,099,856.22/769,311.84
  6. Step 6: Final answer
    x = 580,235.58

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Double scale
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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.