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Finding the Fourth Proportional to 310,960.72, 429,120.84 and 173,138.32

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Solution

The fourth proportional to 310,960.72, 429,120.84 and 173,138.32 is: 238,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,960.72 : 429,120.84 = 173,138.32 : x
  2. Step 2: Convert to fraction form
    310,960.72/429,120.84 = 173,138.32/x
  3. Step 3: Cross multiply
    310,960.72x = 429,120.84 × 173,138.32
  4. Step 4: Simplify right side
    310,960.72x = 74,297,261,314.59
  5. Step 5: Solve for x
    x = 74,297,261,314.59/310,960.72
  6. Step 6: Final answer
    x = 238,928.12

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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.