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Finding the Fourth Proportional to 303,540.30, 455,310.45 and 145,730.70

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Solution

The fourth proportional to 303,540.30, 455,310.45 and 145,730.70 is: 218,596.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,540.30 : 455,310.45 = 145,730.70 : x
  2. Step 2: Convert to fraction form
    303,540.30/455,310.45 = 145,730.70/x
  3. Step 3: Cross multiply
    303,540.30x = 455,310.45 × 145,730.70
  4. Step 4: Simplify right side
    303,540.30x = 66,352,710,595.82
  5. Step 5: Solve for x
    x = 66,352,710,595.82/303,540.30
  6. Step 6: Final answer
    x = 218,596.05

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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.