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Finding the Fourth Proportional to 325,978.19, 488,962.08 and 89,320.87

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Solution

The fourth proportional to 325,978.19, 488,962.08 and 89,320.87 is: 133,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,978.19 : 488,962.08 = 89,320.87 : x
  2. Step 2: Convert to fraction form
    325,978.19/488,962.08 = 89,320.87/x
  3. Step 3: Cross multiply
    325,978.19x = 488,962.08 × 89,320.87
  4. Step 4: Simplify right side
    325,978.19x = 43,674,515,937.80
  5. Step 5: Solve for x
    x = 43,674,515,937.80/325,978.19
  6. Step 6: Final answer
    x = 133,979.87

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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.