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Finding the Fourth Proportional to 718,781.58, 991,860.39 and 412,760.34

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Solution

The fourth proportional to 718,781.58, 991,860.39 and 412,760.34 is: 569,575.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,781.58 : 991,860.39 = 412,760.34 : x
  2. Step 2: Convert to fraction form
    718,781.58/991,860.39 = 412,760.34/x
  3. Step 3: Cross multiply
    718,781.58x = 991,860.39 × 412,760.34
  4. Step 4: Simplify right side
    718,781.58x = 409,400,631,808.93
  5. Step 5: Solve for x
    x = 409,400,631,808.93/718,781.58
  6. Step 6: Final answer
    x = 569,575.85

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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.