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Finding the Fourth Proportional to 482,780.80, 724,171.20 and 127,830.70

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Solution

The fourth proportional to 482,780.80, 724,171.20 and 127,830.70 is: 191,746.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,780.80 : 724,171.20 = 127,830.70 : x
  2. Step 2: Convert to fraction form
    482,780.80/724,171.20 = 127,830.70/x
  3. Step 3: Cross multiply
    482,780.80x = 724,171.20 × 127,830.70
  4. Step 4: Simplify right side
    482,780.80x = 92,571,311,415.84
  5. Step 5: Solve for x
    x = 92,571,311,415.84/482,780.80
  6. Step 6: Final answer
    x = 191,746.05

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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.