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Finding the Fourth Proportional to 308,840.96, 426,207.74 and 172,871.52

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Solution

The fourth proportional to 308,840.96, 426,207.74 and 172,871.52 is: 238,566.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,840.96 : 426,207.74 = 172,871.52 : x
  2. Step 2: Convert to fraction form
    308,840.96/426,207.74 = 172,871.52/x
  3. Step 3: Cross multiply
    308,840.96x = 426,207.74 × 172,871.52
  4. Step 4: Simplify right side
    308,840.96x = 73,679,178,985.21
  5. Step 5: Solve for x
    x = 73,679,178,985.21/308,840.96
  6. Step 6: Final answer
    x = 238,566.74

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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.