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Finding the Fourth Proportional to 491.18, 736.40 and 423.50

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Solution

The fourth proportional to 491.18, 736.40 and 423.50 is: 634.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.18 : 736.40 = 423.50 : x
  2. Step 2: Convert to fraction form
    491.18/736.40 = 423.50/x
  3. Step 3: Cross multiply
    491.18x = 736.40 × 423.50
  4. Step 4: Simplify right side
    491.18x = 311,865.40
  5. Step 5: Solve for x
    x = 311,865.40/491.18
  6. Step 6: Final answer
    x = 634.93

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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.