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Finding the Fourth Proportional to 572,896.21, 790,619.21 and 391,987.57

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Solution

The fourth proportional to 572,896.21, 790,619.21 and 391,987.57 is: 540,958.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,896.21 : 790,619.21 = 391,987.57 : x
  2. Step 2: Convert to fraction form
    572,896.21/790,619.21 = 391,987.57/x
  3. Step 3: Cross multiply
    572,896.21x = 790,619.21 × 391,987.57
  4. Step 4: Simplify right side
    572,896.21x = 309,912,902,923.22
  5. Step 5: Solve for x
    x = 309,912,902,923.22/572,896.21
  6. Step 6: Final answer
    x = 540,958.20

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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.