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Finding the Fourth Proportional to 663,715.20, 995,896.80 and 308,546.40

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Solution

The fourth proportional to 663,715.20, 995,896.80 and 308,546.40 is: 462,970.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,715.20 : 995,896.80 = 308,546.40 : x
  2. Step 2: Convert to fraction form
    663,715.20/995,896.80 = 308,546.40/x
  3. Step 3: Cross multiply
    663,715.20x = 995,896.80 × 308,546.40
  4. Step 4: Simplify right side
    663,715.20x = 307,280,372,411.52
  5. Step 5: Solve for x
    x = 307,280,372,411.52/663,715.20
  6. Step 6: Final answer
    x = 462,970.22

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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.