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Finding the Fourth Proportional to 259,407, 388,606.98 and 170,390.40

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Solution

The fourth proportional to 259,407, 388,606.98 and 170,390.40 is: 255,254.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,407 : 388,606.98 = 170,390.40 : x
  2. Step 2: Convert to fraction form
    259,407/388,606.98 = 170,390.40/x
  3. Step 3: Cross multiply
    259,407x = 388,606.98 × 170,390.40
  4. Step 4: Simplify right side
    259,407x = 66,214,898,764.99
  5. Step 5: Solve for x
    x = 66,214,898,764.99/259,407
  6. Step 6: Final answer
    x = 255,254.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.