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Finding the Fourth Proportional to 642,422.70, 963,196.65 and 243,003.60

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Solution

The fourth proportional to 642,422.70, 963,196.65 and 243,003.60 is: 364,339.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,422.70 : 963,196.65 = 243,003.60 : x
  2. Step 2: Convert to fraction form
    642,422.70/963,196.65 = 243,003.60/x
  3. Step 3: Cross multiply
    642,422.70x = 963,196.65 × 243,003.60
  4. Step 4: Simplify right side
    642,422.70x = 234,060,253,457.94
  5. Step 5: Solve for x
    x = 234,060,253,457.94/642,422.70
  6. Step 6: Final answer
    x = 364,339.95

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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.