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Finding the Fourth Proportional to 679,840.32, 938,167.84 and 378,027.84

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Solution

The fourth proportional to 679,840.32, 938,167.84 and 378,027.84 is: 521,671.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,840.32 : 938,167.84 = 378,027.84 : x
  2. Step 2: Convert to fraction form
    679,840.32/938,167.84 = 378,027.84/x
  3. Step 3: Cross multiply
    679,840.32x = 938,167.84 × 378,027.84
  4. Step 4: Simplify right side
    679,840.32x = 354,653,562,112.67
  5. Step 5: Solve for x
    x = 354,653,562,112.67/679,840.32
  6. Step 6: Final answer
    x = 521,671.86

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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.