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Finding the Fourth Proportional to 644,805.70, 965,896.35 and 329,440.30

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Solution

The fourth proportional to 644,805.70, 965,896.35 and 329,440.30 is: 493,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,805.70 : 965,896.35 = 329,440.30 : x
  2. Step 2: Convert to fraction form
    644,805.70/965,896.35 = 329,440.30/x
  3. Step 3: Cross multiply
    644,805.70x = 965,896.35 × 329,440.30
  4. Step 4: Simplify right side
    644,805.70x = 318,205,183,312.91
  5. Step 5: Solve for x
    x = 318,205,183,312.91/644,805.70
  6. Step 6: Final answer
    x = 493,490.03

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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.