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Finding the Fourth Proportional to 303,690.30, 455,535.45 and 287,360.70

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Solution

The fourth proportional to 303,690.30, 455,535.45 and 287,360.70 is: 431,041.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,690.30 : 455,535.45 = 287,360.70 : x
  2. Step 2: Convert to fraction form
    303,690.30/455,535.45 = 287,360.70/x
  3. Step 3: Cross multiply
    303,690.30x = 455,535.45 × 287,360.70
  4. Step 4: Simplify right side
    303,690.30x = 130,902,985,786.82
  5. Step 5: Solve for x
    x = 130,902,985,786.82/303,690.30
  6. Step 6: Final answer
    x = 431,041.05

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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.