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Finding the Fourth Proportional to 559.06, 837.02 and 421.67

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Solution

The fourth proportional to 559.06, 837.02 and 421.67 is: 631.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.06 : 837.02 = 421.67 : x
  2. Step 2: Convert to fraction form
    559.06/837.02 = 421.67/x
  3. Step 3: Cross multiply
    559.06x = 837.02 × 421.67
  4. Step 4: Simplify right side
    559.06x = 352,946.22
  5. Step 5: Solve for x
    x = 352,946.22/559.06
  6. Step 6: Final answer
    x = 631.33

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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.