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Finding the Fourth Proportional to 559.36, 837.50 and 421.99

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Solution

The fourth proportional to 559.36, 837.50 and 421.99 is: 631.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.36 : 837.50 = 421.99 : x
  2. Step 2: Convert to fraction form
    559.36/837.50 = 421.99/x
  3. Step 3: Cross multiply
    559.36x = 837.50 × 421.99
  4. Step 4: Simplify right side
    559.36x = 353,414.52
  5. Step 5: Solve for x
    x = 353,414.52/559.36
  6. Step 6: Final answer
    x = 631.82

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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.