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Finding the Fourth Proportional to 312,227.53, 430,877.15 and 168,990.64

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Solution

The fourth proportional to 312,227.53, 430,877.15 and 168,990.64 is: 233,208.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,227.53 : 430,877.15 = 168,990.64 : x
  2. Step 2: Convert to fraction form
    312,227.53/430,877.15 = 168,990.64/x
  3. Step 3: Cross multiply
    312,227.53x = 430,877.15 × 168,990.64
  4. Step 4: Simplify right side
    312,227.53x = 72,814,205,339.88
  5. Step 5: Solve for x
    x = 72,814,205,339.88/312,227.53
  6. Step 6: Final answer
    x = 233,208.79

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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.