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Finding the Fourth Proportional to 303,473.80, 455,210.70 and 78,815.80

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Solution

The fourth proportional to 303,473.80, 455,210.70 and 78,815.80 is: 118,223.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,473.80 : 455,210.70 = 78,815.80 : x
  2. Step 2: Convert to fraction form
    303,473.80/455,210.70 = 78,815.80/x
  3. Step 3: Cross multiply
    303,473.80x = 455,210.70 × 78,815.80
  4. Step 4: Simplify right side
    303,473.80x = 35,877,795,489.06
  5. Step 5: Solve for x
    x = 35,877,795,489.06/303,473.80
  6. Step 6: Final answer
    x = 118,223.70

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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.