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Finding the Fourth Proportional to 305,448.18, 421,520.34 and 169,484.79

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Solution

The fourth proportional to 305,448.18, 421,520.34 and 169,484.79 is: 233,890.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,448.18 : 421,520.34 = 169,484.79 : x
  2. Step 2: Convert to fraction form
    305,448.18/421,520.34 = 169,484.79/x
  3. Step 3: Cross multiply
    305,448.18x = 421,520.34 × 169,484.79
  4. Step 4: Simplify right side
    305,448.18x = 71,441,286,305.63
  5. Step 5: Solve for x
    x = 71,441,286,305.63/305,448.18
  6. Step 6: Final answer
    x = 233,890.04

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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.