Home / 664,585.63-917,116.43-378,099.57

Finding the Fourth Proportional to 664,585.63, 917,116.43 and 378,099.57

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Solution

The fourth proportional to 664,585.63, 917,116.43 and 378,099.57 is: 521,770.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,585.63 : 917,116.43 = 378,099.57 : x
  2. Step 2: Convert to fraction form
    664,585.63/917,116.43 = 378,099.57/x
  3. Step 3: Cross multiply
    664,585.63x = 917,116.43 × 378,099.57
  4. Step 4: Simplify right side
    664,585.63x = 346,761,327,822.94
  5. Step 5: Solve for x
    x = 346,761,327,822.94/664,585.63
  6. Step 6: Final answer
    x = 521,770.73

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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.