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Finding the Fourth Proportional to 258,673.15, 356,965.28 and 145,495.63

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Solution

The fourth proportional to 258,673.15, 356,965.28 and 145,495.63 is: 200,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,673.15 : 356,965.28 = 145,495.63 : x
  2. Step 2: Convert to fraction form
    258,673.15/356,965.28 = 145,495.63/x
  3. Step 3: Cross multiply
    258,673.15x = 356,965.28 × 145,495.63
  4. Step 4: Simplify right side
    258,673.15x = 51,936,886,516.90
  5. Step 5: Solve for x
    x = 51,936,886,516.90/258,673.15
  6. Step 6: Final answer
    x = 200,781.90

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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.