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Finding the Fourth Proportional to 258,851.52, 357,143.07 and 155,458.11

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Solution

The fourth proportional to 258,851.52, 357,143.07 and 155,458.11 is: 214,488.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,851.52 : 357,143.07 = 155,458.11 : x
  2. Step 2: Convert to fraction form
    258,851.52/357,143.07 = 155,458.11/x
  3. Step 3: Cross multiply
    258,851.52x = 357,143.07 × 155,458.11
  4. Step 4: Simplify right side
    258,851.52x = 55,520,786,661.80
  5. Step 5: Solve for x
    x = 55,520,786,661.80/258,851.52
  6. Step 6: Final answer
    x = 214,488.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.