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Finding the Fourth Proportional to 611,221.86, 843,443.94 and 339,268.38

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Solution

The fourth proportional to 611,221.86, 843,443.94 and 339,268.38 is: 468,166.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,221.86 : 843,443.94 = 339,268.38 : x
  2. Step 2: Convert to fraction form
    611,221.86/843,443.94 = 339,268.38/x
  3. Step 3: Cross multiply
    611,221.86x = 843,443.94 × 339,268.38
  4. Step 4: Simplify right side
    611,221.86x = 286,153,859,144.62
  5. Step 5: Solve for x
    x = 286,153,859,144.62/611,221.86
  6. Step 6: Final answer
    x = 468,166.93

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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.