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Finding the Fourth Proportional to 1,147.35, 1,720.45 and 562.40

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Solution

The fourth proportional to 1,147.35, 1,720.45 and 562.40 is: 843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.35 : 1,720.45 = 562.40 : x
  2. Step 2: Convert to fraction form
    1,147.35/1,720.45 = 562.40/x
  3. Step 3: Cross multiply
    1,147.35x = 1,720.45 × 562.40
  4. Step 4: Simplify right side
    1,147.35x = 967,581.08
  5. Step 5: Solve for x
    x = 967,581.08/1,147.35
  6. Step 6: Final answer
    x = 843.32

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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.