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Finding the Fourth Proportional to 611,363.21, 843,642.20 and 339,431.04

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Solution

The fourth proportional to 611,363.21, 843,642.20 and 339,431.04 is: 468,393.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,363.21 : 843,642.20 = 339,431.04 : x
  2. Step 2: Convert to fraction form
    611,363.21/843,642.20 = 339,431.04/x
  3. Step 3: Cross multiply
    611,363.21x = 843,642.20 × 339,431.04
  4. Step 4: Simplify right side
    611,363.21x = 286,358,347,636.73
  5. Step 5: Solve for x
    x = 286,358,347,636.73/611,363.21
  6. Step 6: Final answer
    x = 468,393.17

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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.