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Finding the Fourth Proportional to 303,420.20, 455,130.30 and 103,722.80

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Solution

The fourth proportional to 303,420.20, 455,130.30 and 103,722.80 is: 155,584.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,420.20 : 455,130.30 = 103,722.80 : x
  2. Step 2: Convert to fraction form
    303,420.20/455,130.30 = 103,722.80/x
  3. Step 3: Cross multiply
    303,420.20x = 455,130.30 × 103,722.80
  4. Step 4: Simplify right side
    303,420.20x = 47,207,389,080.84
  5. Step 5: Solve for x
    x = 47,207,389,080.84/303,420.20
  6. Step 6: Final answer
    x = 155,584.20

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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.