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Finding the Fourth Proportional to 455,999.20, 683,221.20 and 389,125.60

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Solution

The fourth proportional to 455,999.20, 683,221.20 and 389,125.60 is: 583,024.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,999.20 : 683,221.20 = 389,125.60 : x
  2. Step 2: Convert to fraction form
    455,999.20/683,221.20 = 389,125.60/x
  3. Step 3: Cross multiply
    455,999.20x = 683,221.20 × 389,125.60
  4. Step 4: Simplify right side
    455,999.20x = 265,858,859,382.72
  5. Step 5: Solve for x
    x = 265,858,859,382.72/455,999.20
  6. Step 6: Final answer
    x = 583,024.84

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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.