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Finding the Fourth Proportional to 325,938.40, 488,907.60 and 89,280.70

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Solution

The fourth proportional to 325,938.40, 488,907.60 and 89,280.70 is: 133,921.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,938.40 : 488,907.60 = 89,280.70 : x
  2. Step 2: Convert to fraction form
    325,938.40/488,907.60 = 89,280.70/x
  3. Step 3: Cross multiply
    325,938.40x = 488,907.60 × 89,280.70
  4. Step 4: Simplify right side
    325,938.40x = 43,650,012,763.32
  5. Step 5: Solve for x
    x = 43,650,012,763.32/325,938.40
  6. Step 6: Final answer
    x = 133,921.05

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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.