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Finding the Fourth Proportional to 303,128.12, 454,395.12 and 258,250.88

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Solution

The fourth proportional to 303,128.12, 454,395.12 and 258,250.88 is: 387,123.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,128.12 : 454,395.12 = 258,250.88 : x
  2. Step 2: Convert to fraction form
    303,128.12/454,395.12 = 258,250.88/x
  3. Step 3: Cross multiply
    303,128.12x = 454,395.12 × 258,250.88
  4. Step 4: Simplify right side
    303,128.12x = 117,347,939,775.25
  5. Step 5: Solve for x
    x = 117,347,939,775.25/303,128.12
  6. Step 6: Final answer
    x = 387,123.24

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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.