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Finding the Fourth Proportional to 258,805.41, 357,079.73 and 155,412.93

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Solution

The fourth proportional to 258,805.41, 357,079.73 and 155,412.93 is: 214,426.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,805.41 : 357,079.73 = 155,412.93 : x
  2. Step 2: Convert to fraction form
    258,805.41/357,079.73 = 155,412.93/x
  3. Step 3: Cross multiply
    258,805.41x = 357,079.73 × 155,412.93
  4. Step 4: Simplify right side
    258,805.41x = 55,494,806,305.84
  5. Step 5: Solve for x
    x = 55,494,806,305.84/258,805.41
  6. Step 6: Final answer
    x = 214,426.76

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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.