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Finding the Fourth Proportional to 305,261.48, 421,262.08 and 169,308.12

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Solution

The fourth proportional to 305,261.48, 421,262.08 and 169,308.12 is: 233,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,261.48 : 421,262.08 = 169,308.12 : x
  2. Step 2: Convert to fraction form
    305,261.48/421,262.08 = 169,308.12/x
  3. Step 3: Cross multiply
    305,261.48x = 421,262.08 × 169,308.12
  4. Step 4: Simplify right side
    305,261.48x = 71,323,090,792.09
  5. Step 5: Solve for x
    x = 71,323,090,792.09/305,261.48
  6. Step 6: Final answer
    x = 233,645.89

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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.