Home / 664,982.35-917,681.51-378,520.88

Finding the Fourth Proportional to 664,982.35, 917,681.51 and 378,520.88

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Solution

The fourth proportional to 664,982.35, 917,681.51 and 378,520.88 is: 522,362.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,982.35 : 917,681.51 = 378,520.88 : x
  2. Step 2: Convert to fraction form
    664,982.35/917,681.51 = 378,520.88/x
  3. Step 3: Cross multiply
    664,982.35x = 917,681.51 × 378,520.88
  4. Step 4: Simplify right side
    664,982.35x = 347,361,612,724.93
  5. Step 5: Solve for x
    x = 347,361,612,724.93/664,982.35
  6. Step 6: Final answer
    x = 522,362.15

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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.