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Finding the Fourth Proportional to 456,231.20, 683,569.20 and 389,357.60

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Solution

The fourth proportional to 456,231.20, 683,569.20 and 389,357.60 is: 583,372.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,231.20 : 683,569.20 = 389,357.60 : x
  2. Step 2: Convert to fraction form
    456,231.20/683,569.20 = 389,357.60/x
  3. Step 3: Cross multiply
    456,231.20x = 683,569.20 × 389,357.60
  4. Step 4: Simplify right side
    456,231.20x = 266,152,863,145.92
  5. Step 5: Solve for x
    x = 266,152,863,145.92/456,231.20
  6. Step 6: Final answer
    x = 583,372.78

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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.