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Finding the Fourth Proportional to 485,128.47, 726,888.21 and 295,013.75

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Solution

The fourth proportional to 485,128.47, 726,888.21 and 295,013.75 is: 442,031.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,128.47 : 726,888.21 = 295,013.75 : x
  2. Step 2: Convert to fraction form
    485,128.47/726,888.21 = 295,013.75/x
  3. Step 3: Cross multiply
    485,128.47x = 726,888.21 × 295,013.75
  4. Step 4: Simplify right side
    485,128.47x = 214,442,013,028.45
  5. Step 5: Solve for x
    x = 214,442,013,028.45/485,128.47
  6. Step 6: Final answer
    x = 442,031.39

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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.