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Finding the Fourth Proportional to 310,537.42, 428,558.51 and 172,730.90

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Solution

The fourth proportional to 310,537.42, 428,558.51 and 172,730.90 is: 238,378.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,537.42 : 428,558.51 = 172,730.90 : x
  2. Step 2: Convert to fraction form
    310,537.42/428,558.51 = 172,730.90/x
  3. Step 3: Cross multiply
    310,537.42x = 428,558.51 × 172,730.90
  4. Step 4: Simplify right side
    310,537.42x = 74,025,297,134.96
  5. Step 5: Solve for x
    x = 74,025,297,134.96/310,537.42
  6. Step 6: Final answer
    x = 238,378.03

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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.