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Finding the Fourth Proportional to 258,158.79, 356,254.65 and 143,438.49

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Solution

The fourth proportional to 258,158.79, 356,254.65 and 143,438.49 is: 197,942.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,158.79 : 356,254.65 = 143,438.49 : x
  2. Step 2: Convert to fraction form
    258,158.79/356,254.65 = 143,438.49/x
  3. Step 3: Cross multiply
    258,158.79x = 356,254.65 × 143,438.49
  4. Step 4: Simplify right side
    258,158.79x = 51,100,629,051.48
  5. Step 5: Solve for x
    x = 51,100,629,051.48/258,158.79
  6. Step 6: Final answer
    x = 197,942.63

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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.