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Finding the Fourth Proportional to 488,123.60, 732,622.80 and 421,638.80

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Solution

The fourth proportional to 488,123.60, 732,622.80 and 421,638.80 is: 632,836.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,123.60 : 732,622.80 = 421,638.80 : x
  2. Step 2: Convert to fraction form
    488,123.60/732,622.80 = 421,638.80/x
  3. Step 3: Cross multiply
    488,123.60x = 732,622.80 × 421,638.80
  4. Step 4: Simplify right side
    488,123.60x = 308,902,198,244.64
  5. Step 5: Solve for x
    x = 308,902,198,244.64/488,123.60
  6. Step 6: Final answer
    x = 632,836.02

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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.