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Finding the Fourth Proportional to 260,728.86, 359,810.92 and 170,142.78

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Solution

The fourth proportional to 260,728.86, 359,810.92 and 170,142.78 is: 234,800.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,728.86 : 359,810.92 = 170,142.78 : x
  2. Step 2: Convert to fraction form
    260,728.86/359,810.92 = 170,142.78/x
  3. Step 3: Cross multiply
    260,728.86x = 359,810.92 × 170,142.78
  4. Step 4: Simplify right side
    260,728.86x = 61,219,227,978.75
  5. Step 5: Solve for x
    x = 61,219,227,978.75/260,728.86
  6. Step 6: Final answer
    x = 234,800.36

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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.