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Finding the Fourth Proportional to 258,397.38, 387,671.40 and 158,621.58

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Solution

The fourth proportional to 258,397.38, 387,671.40 and 158,621.58 is: 237,978.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,397.38 : 387,671.40 = 158,621.58 : x
  2. Step 2: Convert to fraction form
    258,397.38/387,671.40 = 158,621.58/x
  3. Step 3: Cross multiply
    258,397.38x = 387,671.40 × 158,621.58
  4. Step 4: Simplify right side
    258,397.38x = 61,493,049,988.81
  5. Step 5: Solve for x
    x = 61,493,049,988.81/258,397.38
  6. Step 6: Final answer
    x = 237,978.61

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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.