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Finding the Fourth Proportional to 306,997.20, 423,669.21 and 171,031.07

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Solution

The fourth proportional to 306,997.20, 423,669.21 and 171,031.07 is: 236,030.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,997.20 : 423,669.21 = 171,031.07 : x
  2. Step 2: Convert to fraction form
    306,997.20/423,669.21 = 171,031.07/x
  3. Step 3: Cross multiply
    306,997.20x = 423,669.21 × 171,031.07
  4. Step 4: Simplify right side
    306,997.20x = 72,460,598,312.35
  5. Step 5: Solve for x
    x = 72,460,598,312.35/306,997.20
  6. Step 6: Final answer
    x = 236,030.16

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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.