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Finding the Fourth Proportional to 928,404.80, 1,392,412.80 and 455,429.60

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Solution

The fourth proportional to 928,404.80, 1,392,412.80 and 455,429.60 is: 683,049.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,404.80 : 1,392,412.80 = 455,429.60 : x
  2. Step 2: Convert to fraction form
    928,404.80/1,392,412.80 = 455,429.60/x
  3. Step 3: Cross multiply
    928,404.80x = 1,392,412.80 × 455,429.60
  4. Step 4: Simplify right side
    928,404.80x = 634,146,004,538.88
  5. Step 5: Solve for x
    x = 634,146,004,538.88/928,404.80
  6. Step 6: Final answer
    x = 683,049.04

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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.