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Finding the Fourth Proportional to 258,561.76, 356,817.36 and 145,383.52

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Solution

The fourth proportional to 258,561.76, 356,817.36 and 145,383.52 is: 200,630.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,561.76 : 356,817.36 = 145,383.52 : x
  2. Step 2: Convert to fraction form
    258,561.76/356,817.36 = 145,383.52/x
  3. Step 3: Cross multiply
    258,561.76x = 356,817.36 × 145,383.52
  4. Step 4: Simplify right side
    258,561.76x = 51,875,363,793.91
  5. Step 5: Solve for x
    x = 51,875,363,793.91/258,561.76
  6. Step 6: Final answer
    x = 200,630.46

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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.