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Finding the Fourth Proportional to 305,261.14, 421,285.59 and 169,338.91

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Solution

The fourth proportional to 305,261.14, 421,285.59 and 169,338.91 is: 233,701.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,261.14 : 421,285.59 = 169,338.91 : x
  2. Step 2: Convert to fraction form
    305,261.14/421,285.59 = 169,338.91/x
  3. Step 3: Cross multiply
    305,261.14x = 421,285.59 × 169,338.91
  4. Step 4: Simplify right side
    305,261.14x = 71,340,039,656.18
  5. Step 5: Solve for x
    x = 71,340,039,656.18/305,261.14
  6. Step 6: Final answer
    x = 233,701.68

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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.