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Finding the Fourth Proportional to 323,615.65, 485,345.62 and 98,978.03

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Solution

The fourth proportional to 323,615.65, 485,345.62 and 98,978.03 is: 148,443.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,615.65 : 485,345.62 = 98,978.03 : x
  2. Step 2: Convert to fraction form
    323,615.65/485,345.62 = 98,978.03/x
  3. Step 3: Cross multiply
    323,615.65x = 485,345.62 × 98,978.03
  4. Step 4: Simplify right side
    323,615.65x = 48,038,553,336.73
  5. Step 5: Solve for x
    x = 48,038,553,336.73/323,615.65
  6. Step 6: Final answer
    x = 148,443.23

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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.