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Finding the Fourth Proportional to 611,628.60, 844,058.70 and 339,721.72

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Solution

The fourth proportional to 611,628.60, 844,058.70 and 339,721.72 is: 468,822.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,628.60 : 844,058.70 = 339,721.72 : x
  2. Step 2: Convert to fraction form
    611,628.60/844,058.70 = 339,721.72/x
  3. Step 3: Cross multiply
    611,628.60x = 844,058.70 × 339,721.72
  4. Step 4: Simplify right side
    611,628.60x = 286,745,073,344.96
  5. Step 5: Solve for x
    x = 286,745,073,344.96/611,628.60
  6. Step 6: Final answer
    x = 468,822.21

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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.