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Finding the Fourth Proportional to 429,439.40, 644,815.20 and 329,712.20

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Solution

The fourth proportional to 429,439.40, 644,815.20 and 329,712.20 is: 495,072.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,439.40 : 644,815.20 = 329,712.20 : x
  2. Step 2: Convert to fraction form
    429,439.40/644,815.20 = 329,712.20/x
  3. Step 3: Cross multiply
    429,439.40x = 644,815.20 × 329,712.20
  4. Step 4: Simplify right side
    429,439.40x = 212,603,438,185.44
  5. Step 5: Solve for x
    x = 212,603,438,185.44/429,439.40
  6. Step 6: Final answer
    x = 495,072.04

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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.