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Finding the Fourth Proportional to 611,363.40, 843,691.41 and 339,448.83

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Solution

The fourth proportional to 611,363.40, 843,691.41 and 339,448.83 is: 468,444.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,363.40 : 843,691.41 = 339,448.83 : x
  2. Step 2: Convert to fraction form
    611,363.40/843,691.41 = 339,448.83/x
  3. Step 3: Cross multiply
    611,363.40x = 843,691.41 × 339,448.83
  4. Step 4: Simplify right side
    611,363.40x = 286,390,062,005.55
  5. Step 5: Solve for x
    x = 286,390,062,005.55/611,363.40
  6. Step 6: Final answer
    x = 468,444.89

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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.