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Finding the Fourth Proportional to 308,619.68, 425,885.37 and 172,656.01

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Solution

The fourth proportional to 308,619.68, 425,885.37 and 172,656.01 is: 238,259.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,619.68 : 425,885.37 = 172,656.01 : x
  2. Step 2: Convert to fraction form
    308,619.68/425,885.37 = 172,656.01/x
  3. Step 3: Cross multiply
    308,619.68x = 425,885.37 × 172,656.01
  4. Step 4: Simplify right side
    308,619.68x = 73,531,666,572.15
  5. Step 5: Solve for x
    x = 73,531,666,572.15/308,619.68
  6. Step 6: Final answer
    x = 238,259.81

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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.