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Finding the Fourth Proportional to 638,728.80, 957,655.80 and 301,930.80

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Solution

The fourth proportional to 638,728.80, 957,655.80 and 301,930.80 is: 452,689.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,728.80 : 957,655.80 = 301,930.80 : x
  2. Step 2: Convert to fraction form
    638,728.80/957,655.80 = 301,930.80/x
  3. Step 3: Cross multiply
    638,728.80x = 957,655.80 × 301,930.80
  4. Step 4: Simplify right side
    638,728.80x = 289,145,781,818.64
  5. Step 5: Solve for x
    x = 289,145,781,818.64/638,728.80
  6. Step 6: Final answer
    x = 452,689.44

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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.