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Finding the Fourth Proportional to 305,132.82, 421,108.23 and 169,209.40

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Solution

The fourth proportional to 305,132.82, 421,108.23 and 169,209.40 is: 233,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,132.82 : 421,108.23 = 169,209.40 : x
  2. Step 2: Convert to fraction form
    305,132.82/421,108.23 = 169,209.40/x
  3. Step 3: Cross multiply
    305,132.82x = 421,108.23 × 169,209.40
  4. Step 4: Simplify right side
    305,132.82x = 71,255,470,933.36
  5. Step 5: Solve for x
    x = 71,255,470,933.36/305,132.82
  6. Step 6: Final answer
    x = 233,522.80

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1.5x scale

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.