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Finding the Fourth Proportional to 488,189.60, 732,721.80 and 421,704.80

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Solution

The fourth proportional to 488,189.60, 732,721.80 and 421,704.80 is: 632,935.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,189.60 : 732,721.80 = 421,704.80 : x
  2. Step 2: Convert to fraction form
    488,189.60/732,721.80 = 421,704.80/x
  3. Step 3: Cross multiply
    488,189.60x = 732,721.80 × 421,704.80
  4. Step 4: Simplify right side
    488,189.60x = 308,992,300,124.64
  5. Step 5: Solve for x
    x = 308,992,300,124.64/488,189.60
  6. Step 6: Final answer
    x = 632,935.03

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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.