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Finding the Fourth Proportional to 303,072.90, 455,265.45 and 291,919.20

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Solution

The fourth proportional to 303,072.90, 455,265.45 and 291,919.20 is: 438,510.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,072.90 : 455,265.45 = 291,919.20 : x
  2. Step 2: Convert to fraction form
    303,072.90/455,265.45 = 291,919.20/x
  3. Step 3: Cross multiply
    303,072.90x = 455,265.45 × 291,919.20
  4. Step 4: Simplify right side
    303,072.90x = 132,900,725,951.64
  5. Step 5: Solve for x
    x = 132,900,725,951.64/303,072.90
  6. Step 6: Final answer
    x = 438,510.75

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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.