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Finding the Fourth Proportional to 258,858.39, 357,248.70 and 151,421.61

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Solution

The fourth proportional to 258,858.39, 357,248.70 and 151,421.61 is: 208,975.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,858.39 : 357,248.70 = 151,421.61 : x
  2. Step 2: Convert to fraction form
    258,858.39/357,248.70 = 151,421.61/x
  3. Step 3: Cross multiply
    258,858.39x = 357,248.70 × 151,421.61
  4. Step 4: Simplify right side
    258,858.39x = 54,095,173,324.41
  5. Step 5: Solve for x
    x = 54,095,173,324.41/258,858.39
  6. Step 6: Final answer
    x = 208,975.93

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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.