Home / 645,128.80-966,915.60-329,423.20

Finding the Fourth Proportional to 645,128.80, 966,915.60 and 329,423.20

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Solution

The fourth proportional to 645,128.80, 966,915.60 and 329,423.20 is: 493,737.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,128.80 : 966,915.60 = 329,423.20 : x
  2. Step 2: Convert to fraction form
    645,128.80/966,915.60 = 329,423.20/x
  3. Step 3: Cross multiply
    645,128.80x = 966,915.60 × 329,423.20
  4. Step 4: Simplify right side
    645,128.80x = 318,524,431,081.92
  5. Step 5: Solve for x
    x = 318,524,431,081.92/645,128.80
  6. Step 6: Final answer
    x = 493,737.73

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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.