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Finding the Fourth Proportional to 647,813.80, 971,331.90 and 332,885.80

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Solution

The fourth proportional to 647,813.80, 971,331.90 and 332,885.80 is: 499,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,813.80 : 971,331.90 = 332,885.80 : x
  2. Step 2: Convert to fraction form
    647,813.80/971,331.90 = 332,885.80/x
  3. Step 3: Cross multiply
    647,813.80x = 971,331.90 × 332,885.80
  4. Step 4: Simplify right side
    647,813.80x = 323,342,596,597.02
  5. Step 5: Solve for x
    x = 323,342,596,597.02/647,813.80
  6. Step 6: Final answer
    x = 499,128.91

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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.