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Finding the Fourth Proportional to 704.40, 972.42 and 456.12

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Solution

The fourth proportional to 704.40, 972.42 and 456.12 is: 629.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.40 : 972.42 = 456.12 : x
  2. Step 2: Convert to fraction form
    704.40/972.42 = 456.12/x
  3. Step 3: Cross multiply
    704.40x = 972.42 × 456.12
  4. Step 4: Simplify right side
    704.40x = 443,540.21
  5. Step 5: Solve for x
    x = 443,540.21/704.40
  6. Step 6: Final answer
    x = 629.67

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.