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Finding the Fourth Proportional to 1,564.62, 2,347 and 410.38

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Solution

The fourth proportional to 1,564.62, 2,347 and 410.38 is: 615.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564.62 : 2,347 = 410.38 : x
  2. Step 2: Convert to fraction form
    1,564.62/2,347 = 410.38/x
  3. Step 3: Cross multiply
    1,564.62x = 2,347 × 410.38
  4. Step 4: Simplify right side
    1,564.62x = 963,161.86
  5. Step 5: Solve for x
    x = 963,161.86/1,564.62
  6. Step 6: Final answer
    x = 615.59

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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.