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Finding the Fourth Proportional to 637,998.40, 957,128.84 and 438,412.78

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Solution

The fourth proportional to 637,998.40, 957,128.84 and 438,412.78 is: 657,709.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,998.40 : 957,128.84 = 438,412.78 : x
  2. Step 2: Convert to fraction form
    637,998.40/957,128.84 = 438,412.78/x
  3. Step 3: Cross multiply
    637,998.40x = 957,128.84 × 438,412.78
  4. Step 4: Simplify right side
    637,998.40x = 419,617,515,562.58
  5. Step 5: Solve for x
    x = 419,617,515,562.58/637,998.40
  6. Step 6: Final answer
    x = 657,709.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.