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Finding the Fourth Proportional to 258,289.92, 356,437.78 and 143,565.64

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Solution

The fourth proportional to 258,289.92, 356,437.78 and 143,565.64 is: 198,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,289.92 : 356,437.78 = 143,565.64 : x
  2. Step 2: Convert to fraction form
    258,289.92/356,437.78 = 143,565.64/x
  3. Step 3: Cross multiply
    258,289.92x = 356,437.78 × 143,565.64
  4. Step 4: Simplify right side
    258,289.92x = 51,172,218,005.88
  5. Step 5: Solve for x
    x = 51,172,218,005.88/258,289.92
  6. Step 6: Final answer
    x = 198,119.30

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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.