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Finding the Fourth Proportional to 704.38, 972.10 and 409.63

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Solution

The fourth proportional to 704.38, 972.10 and 409.63 is: 565.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.38 : 972.10 = 409.63 : x
  2. Step 2: Convert to fraction form
    704.38/972.10 = 409.63/x
  3. Step 3: Cross multiply
    704.38x = 972.10 × 409.63
  4. Step 4: Simplify right side
    704.38x = 398,199.40
  5. Step 5: Solve for x
    x = 398,199.40/704.38
  6. Step 6: Final answer
    x = 565.32

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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.