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Finding the Fourth Proportional to 800,813.91, 1,105,123.22 and 438,237.78

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Solution

The fourth proportional to 800,813.91, 1,105,123.22 and 438,237.78 is: 604,768.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,813.91 : 1,105,123.22 = 438,237.78 : x
  2. Step 2: Convert to fraction form
    800,813.91/1,105,123.22 = 438,237.78/x
  3. Step 3: Cross multiply
    800,813.91x = 1,105,123.22 × 438,237.78
  4. Step 4: Simplify right side
    800,813.91x = 484,306,744,368.06
  5. Step 5: Solve for x
    x = 484,306,744,368.06/800,813.91
  6. Step 6: Final answer
    x = 604,768.15

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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.