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Finding the Fourth Proportional to 437.96, 653.53 and 431.24

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Solution

The fourth proportional to 437.96, 653.53 and 431.24 is: 643.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.96 : 653.53 = 431.24 : x
  2. Step 2: Convert to fraction form
    437.96/653.53 = 431.24/x
  3. Step 3: Cross multiply
    437.96x = 653.53 × 431.24
  4. Step 4: Simplify right side
    437.96x = 281,828.28
  5. Step 5: Solve for x
    x = 281,828.28/437.96
  6. Step 6: Final answer
    x = 643.50

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.