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Finding the Fourth Proportional to 258,755.31, 357,081.75 and 145,578.06

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Solution

The fourth proportional to 258,755.31, 357,081.75 and 145,578.06 is: 200,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,755.31 : 357,081.75 = 145,578.06 : x
  2. Step 2: Convert to fraction form
    258,755.31/357,081.75 = 145,578.06/x
  3. Step 3: Cross multiply
    258,755.31x = 357,081.75 × 145,578.06
  4. Step 4: Simplify right side
    258,755.31x = 51,983,268,426.41
  5. Step 5: Solve for x
    x = 51,983,268,426.41/258,755.31
  6. Step 6: Final answer
    x = 200,897.40

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1.5x scale

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.