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Finding the Fourth Proportional to 305,587.68, 421,702.90 and 169,621.24

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Solution

The fourth proportional to 305,587.68, 421,702.90 and 169,621.24 is: 234,072.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,587.68 : 421,702.90 = 169,621.24 : x
  2. Step 2: Convert to fraction form
    305,587.68/421,702.90 = 169,621.24/x
  3. Step 3: Cross multiply
    305,587.68x = 421,702.90 × 169,621.24
  4. Step 4: Simplify right side
    305,587.68x = 71,529,768,809.60
  5. Step 5: Solve for x
    x = 71,529,768,809.60/305,587.68
  6. Step 6: Final answer
    x = 234,072.82

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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.