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Finding the Fourth Proportional to 4,242.72, 6,363.72 and 1,320.75

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Solution

The fourth proportional to 4,242.72, 6,363.72 and 1,320.75 is: 1,981.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,242.72 : 6,363.72 = 1,320.75 : x
  2. Step 2: Convert to fraction form
    4,242.72/6,363.72 = 1,320.75/x
  3. Step 3: Cross multiply
    4,242.72x = 6,363.72 × 1,320.75
  4. Step 4: Simplify right side
    4,242.72x = 8,404,883.19
  5. Step 5: Solve for x
    x = 8,404,883.19/4,242.72
  6. Step 6: Final answer
    x = 1,981.01

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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.