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Finding the Fourth Proportional to 310,961.72, 429,122.22 and 173,139.32

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Solution

The fourth proportional to 310,961.72, 429,122.22 and 173,139.32 is: 238,929.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,961.72 : 429,122.22 = 173,139.32 : x
  2. Step 2: Convert to fraction form
    310,961.72/429,122.22 = 173,139.32/x
  3. Step 3: Cross multiply
    310,961.72x = 429,122.22 × 173,139.32
  4. Step 4: Simplify right side
    310,961.72x = 74,297,929,367.69
  5. Step 5: Solve for x
    x = 74,297,929,367.69/310,961.72
  6. Step 6: Final answer
    x = 238,929.50

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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.