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Finding the Fourth Proportional to 404,085.96, 557,433.78 and 308,426.58

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Solution

The fourth proportional to 404,085.96, 557,433.78 and 308,426.58 is: 425,472.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,085.96 : 557,433.78 = 308,426.58 : x
  2. Step 2: Convert to fraction form
    404,085.96/557,433.78 = 308,426.58/x
  3. Step 3: Cross multiply
    404,085.96x = 557,433.78 × 308,426.58
  4. Step 4: Simplify right side
    404,085.96x = 171,927,394,341.87
  5. Step 5: Solve for x
    x = 171,927,394,341.87/404,085.96
  6. Step 6: Final answer
    x = 425,472.33

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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.