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Finding the Fourth Proportional to 306,643.80, 423,167.82 and 172,507.80

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Solution

The fourth proportional to 306,643.80, 423,167.82 and 172,507.80 is: 238,060.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,643.80 : 423,167.82 = 172,507.80 : x
  2. Step 2: Convert to fraction form
    306,643.80/423,167.82 = 172,507.80/x
  3. Step 3: Cross multiply
    306,643.80x = 423,167.82 × 172,507.80
  4. Step 4: Simplify right side
    306,643.80x = 72,999,749,659.00
  5. Step 5: Solve for x
    x = 72,999,749,659.00/306,643.80
  6. Step 6: Final answer
    x = 238,060.41

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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.