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Finding the Fourth Proportional to 303,503.20, 455,254.80 and 287,951.20

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Solution

The fourth proportional to 303,503.20, 455,254.80 and 287,951.20 is: 431,926.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,503.20 : 455,254.80 = 287,951.20 : x
  2. Step 2: Convert to fraction form
    303,503.20/455,254.80 = 287,951.20/x
  3. Step 3: Cross multiply
    303,503.20x = 455,254.80 × 287,951.20
  4. Step 4: Simplify right side
    303,503.20x = 131,091,165,965.76
  5. Step 5: Solve for x
    x = 131,091,165,965.76/303,503.20
  6. Step 6: Final answer
    x = 431,926.80

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1.5x scale

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.