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Finding the Fourth Proportional to 486,069.20, 730,486.20 and 425,243.60

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Solution

The fourth proportional to 486,069.20, 730,486.20 and 425,243.60 is: 639,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,069.20 : 730,486.20 = 425,243.60 : x
  2. Step 2: Convert to fraction form
    486,069.20/730,486.20 = 425,243.60/x
  3. Step 3: Cross multiply
    486,069.20x = 730,486.20 × 425,243.60
  4. Step 4: Simplify right side
    486,069.20x = 310,634,581,438.32
  5. Step 5: Solve for x
    x = 310,634,581,438.32/486,069.20
  6. Step 6: Final answer
    x = 639,074.81

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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.