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Finding the Fourth Proportional to 512,428.70, 768,643.05 and 483,398.30

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Solution

The fourth proportional to 512,428.70, 768,643.05 and 483,398.30 is: 725,097.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,428.70 : 768,643.05 = 483,398.30 : x
  2. Step 2: Convert to fraction form
    512,428.70/768,643.05 = 483,398.30/x
  3. Step 3: Cross multiply
    512,428.70x = 768,643.05 × 483,398.30
  4. Step 4: Simplify right side
    512,428.70x = 371,560,743,676.82
  5. Step 5: Solve for x
    x = 371,560,743,676.82/512,428.70
  6. Step 6: Final answer
    x = 725,097.45

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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.