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Finding the Fourth Proportional to 312,307.72, 430,984.56 and 169,067.66

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Solution

The fourth proportional to 312,307.72, 430,984.56 and 169,067.66 is: 233,313.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,307.72 : 430,984.56 = 169,067.66 : x
  2. Step 2: Convert to fraction form
    312,307.72/430,984.56 = 169,067.66/x
  3. Step 3: Cross multiply
    312,307.72x = 430,984.56 × 169,067.66
  4. Step 4: Simplify right side
    312,307.72x = 72,865,551,055.33
  5. Step 5: Solve for x
    x = 72,865,551,055.33/312,307.72
  6. Step 6: Final answer
    x = 233,313.32

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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.