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Finding the Fourth Proportional to 316,678.41, 437,016.87 and 171,485.78

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Solution

The fourth proportional to 316,678.41, 437,016.87 and 171,485.78 is: 236,650.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,678.41 : 437,016.87 = 171,485.78 : x
  2. Step 2: Convert to fraction form
    316,678.41/437,016.87 = 171,485.78/x
  3. Step 3: Cross multiply
    316,678.41x = 437,016.87 × 171,485.78
  4. Step 4: Simplify right side
    316,678.41x = 74,942,176,640.02
  5. Step 5: Solve for x
    x = 74,942,176,640.02/316,678.41
  6. Step 6: Final answer
    x = 236,650.73

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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.