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Finding the Fourth Proportional to 709,653.96, 979,314.30 and 387,361.44

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Solution

The fourth proportional to 709,653.96, 979,314.30 and 387,361.44 is: 534,554.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,653.96 : 979,314.30 = 387,361.44 : x
  2. Step 2: Convert to fraction form
    709,653.96/979,314.30 = 387,361.44/x
  3. Step 3: Cross multiply
    709,653.96x = 979,314.30 × 387,361.44
  4. Step 4: Simplify right side
    709,653.96x = 379,348,597,460.59
  5. Step 5: Solve for x
    x = 379,348,597,460.59/709,653.96
  6. Step 6: Final answer
    x = 534,554.33

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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.