Home / 644,629.40-966,137.70-329,211.80

Finding the Fourth Proportional to 644,629.40, 966,137.70 and 329,211.80

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Solution

The fourth proportional to 644,629.40, 966,137.70 and 329,211.80 is: 493,405.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,629.40 : 966,137.70 = 329,211.80 : x
  2. Step 2: Convert to fraction form
    644,629.40/966,137.70 = 329,211.80/x
  3. Step 3: Cross multiply
    644,629.40x = 966,137.70 × 329,211.80
  4. Step 4: Simplify right side
    644,629.40x = 318,063,931,264.86
  5. Step 5: Solve for x
    x = 318,063,931,264.86/644,629.40
  6. Step 6: Final answer
    x = 493,405.87

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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.