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Finding the Fourth Proportional to 310,627.42, 428,701.13 and 172,819.99

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Solution

The fourth proportional to 310,627.42, 428,701.13 and 172,819.99 is: 238,511.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,627.42 : 428,701.13 = 172,819.99 : x
  2. Step 2: Convert to fraction form
    310,627.42/428,701.13 = 172,819.99/x
  3. Step 3: Cross multiply
    310,627.42x = 428,701.13 × 172,819.99
  4. Step 4: Simplify right side
    310,627.42x = 74,088,124,999.59
  5. Step 5: Solve for x
    x = 74,088,124,999.59/310,627.42
  6. Step 6: Final answer
    x = 238,511.22

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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.