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Finding the Fourth Proportional to 305,339.62, 421,419.11 and 169,417.30

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Solution

The fourth proportional to 305,339.62, 421,419.11 and 169,417.30 is: 233,823.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,339.62 : 421,419.11 = 169,417.30 : x
  2. Step 2: Convert to fraction form
    305,339.62/421,419.11 = 169,417.30/x
  3. Step 3: Cross multiply
    305,339.62x = 421,419.11 × 169,417.30
  4. Step 4: Simplify right side
    305,339.62x = 71,395,687,784.60
  5. Step 5: Solve for x
    x = 71,395,687,784.60/305,339.62
  6. Step 6: Final answer
    x = 233,823.86

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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.