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Finding the Fourth Proportional to 303,427.20, 455,140.80 and 103,729.80

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Solution

The fourth proportional to 303,427.20, 455,140.80 and 103,729.80 is: 155,594.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,427.20 : 455,140.80 = 103,729.80 : x
  2. Step 2: Convert to fraction form
    303,427.20/455,140.80 = 103,729.80/x
  3. Step 3: Cross multiply
    303,427.20x = 455,140.80 × 103,729.80
  4. Step 4: Simplify right side
    303,427.20x = 47,211,664,155.84
  5. Step 5: Solve for x
    x = 47,211,664,155.84/303,427.20
  6. Step 6: Final answer
    x = 155,594.70

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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.