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Finding the Fourth Proportional to 452,629.97, 679,018.43 and 153,128.78

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Solution

The fourth proportional to 452,629.97, 679,018.43 and 153,128.78 is: 229,718.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,629.97 : 679,018.43 = 153,128.78 : x
  2. Step 2: Convert to fraction form
    452,629.97/679,018.43 = 153,128.78/x
  3. Step 3: Cross multiply
    452,629.97x = 679,018.43 × 153,128.78
  4. Step 4: Simplify right side
    452,629.97x = 103,977,260,771.15
  5. Step 5: Solve for x
    x = 103,977,260,771.15/452,629.97
  6. Step 6: Final answer
    x = 229,718.02

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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.