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Finding the Fourth Proportional to 493.40, 736.53 and 420.48

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Solution

The fourth proportional to 493.40, 736.53 and 420.48 is: 627.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.40 : 736.53 = 420.48 : x
  2. Step 2: Convert to fraction form
    493.40/736.53 = 420.48/x
  3. Step 3: Cross multiply
    493.40x = 736.53 × 420.48
  4. Step 4: Simplify right side
    493.40x = 309,696.13
  5. Step 5: Solve for x
    x = 309,696.13/493.40
  6. Step 6: Final answer
    x = 627.68

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.