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Finding the Fourth Proportional to 482,928.40, 724,392.60 and 127,978.30

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Solution

The fourth proportional to 482,928.40, 724,392.60 and 127,978.30 is: 191,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,928.40 : 724,392.60 = 127,978.30 : x
  2. Step 2: Convert to fraction form
    482,928.40/724,392.60 = 127,978.30/x
  3. Step 3: Cross multiply
    482,928.40x = 724,392.60 × 127,978.30
  4. Step 4: Simplify right side
    482,928.40x = 92,706,533,480.58
  5. Step 5: Solve for x
    x = 92,706,533,480.58/482,928.40
  6. Step 6: Final answer
    x = 191,967.45

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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.