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Finding the Fourth Proportional to 389,375.20, 583,141.20 and 264,037.60

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Solution

The fourth proportional to 389,375.20, 583,141.20 and 264,037.60 is: 395,431.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,375.20 : 583,141.20 = 264,037.60 : x
  2. Step 2: Convert to fraction form
    389,375.20/583,141.20 = 264,037.60/x
  3. Step 3: Cross multiply
    389,375.20x = 583,141.20 × 264,037.60
  4. Step 4: Simplify right side
    389,375.20x = 153,971,202,909.12
  5. Step 5: Solve for x
    x = 153,971,202,909.12/389,375.20
  6. Step 6: Final answer
    x = 395,431.46

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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.