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Finding the Fourth Proportional to 308,620.18, 425,886.06 and 172,656.51

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Solution

The fourth proportional to 308,620.18, 425,886.06 and 172,656.51 is: 238,260.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,620.18 : 425,886.06 = 172,656.51 : x
  2. Step 2: Convert to fraction form
    308,620.18/425,886.06 = 172,656.51/x
  3. Step 3: Cross multiply
    308,620.18x = 425,886.06 × 172,656.51
  4. Step 4: Simplify right side
    308,620.18x = 73,532,000,777.25
  5. Step 5: Solve for x
    x = 73,532,000,777.25/308,620.18
  6. Step 6: Final answer
    x = 238,260.51

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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.