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Finding the Fourth Proportional to 429,938.80, 644,908.20 and 330,600.40

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Solution

The fourth proportional to 429,938.80, 644,908.20 and 330,600.40 is: 495,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,938.80 : 644,908.20 = 330,600.40 : x
  2. Step 2: Convert to fraction form
    429,938.80/644,908.20 = 330,600.40/x
  3. Step 3: Cross multiply
    429,938.80x = 644,908.20 × 330,600.40
  4. Step 4: Simplify right side
    429,938.80x = 213,206,908,883.28
  5. Step 5: Solve for x
    x = 213,206,908,883.28/429,938.80
  6. Step 6: Final answer
    x = 495,900.60

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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.