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Finding the Fourth Proportional to 258,246.45, 356,379.75 and 143,521.45

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Solution

The fourth proportional to 258,246.45, 356,379.75 and 143,521.45 is: 198,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,246.45 : 356,379.75 = 143,521.45 : x
  2. Step 2: Convert to fraction form
    258,246.45/356,379.75 = 143,521.45/x
  3. Step 3: Cross multiply
    258,246.45x = 356,379.75 × 143,521.45
  4. Step 4: Simplify right side
    258,246.45x = 51,148,137,579.69
  5. Step 5: Solve for x
    x = 51,148,137,579.69/258,246.45
  6. Step 6: Final answer
    x = 198,059.40

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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.