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Finding the Fourth Proportional to 572,019.99, 858,255.98 and 217,128.21

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Solution

The fourth proportional to 572,019.99, 858,255.98 and 217,128.21 is: 325,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,019.99 : 858,255.98 = 217,128.21 : x
  2. Step 2: Convert to fraction form
    572,019.99/858,255.98 = 217,128.21/x
  3. Step 3: Cross multiply
    572,019.99x = 858,255.98 × 217,128.21
  4. Step 4: Simplify right side
    572,019.99x = 186,351,584,659.20
  5. Step 5: Solve for x
    x = 186,351,584,659.20/572,019.99
  6. Step 6: Final answer
    x = 325,778.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.