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Finding the Fourth Proportional to 257,391.37, 355,079.95 and 161,950.69

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Solution

The fourth proportional to 257,391.37, 355,079.95 and 161,950.69 is: 223,416.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,391.37 : 355,079.95 = 161,950.69 : x
  2. Step 2: Convert to fraction form
    257,391.37/355,079.95 = 161,950.69/x
  3. Step 3: Cross multiply
    257,391.37x = 355,079.95 × 161,950.69
  4. Step 4: Simplify right side
    257,391.37x = 57,505,443,857.61
  5. Step 5: Solve for x
    x = 57,505,443,857.61/257,391.37
  6. Step 6: Final answer
    x = 223,416.36

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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.