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Finding the Fourth Proportional to 642,121.20, 962,490.60 and 242,607.60

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Solution

The fourth proportional to 642,121.20, 962,490.60 and 242,607.60 is: 363,650.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,121.20 : 962,490.60 = 242,607.60 : x
  2. Step 2: Convert to fraction form
    642,121.20/962,490.60 = 242,607.60/x
  3. Step 3: Cross multiply
    642,121.20x = 962,490.60 × 242,607.60
  4. Step 4: Simplify right side
    642,121.20x = 233,507,534,488.56
  5. Step 5: Solve for x
    x = 233,507,534,488.56/642,121.20
  6. Step 6: Final answer
    x = 363,650.25

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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.