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Finding the Fourth Proportional to 4,705, 7,057.91 and 1,242.25

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Solution

The fourth proportional to 4,705, 7,057.91 and 1,242.25 is: 1,863.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,705 : 7,057.91 = 1,242.25 : x
  2. Step 2: Convert to fraction form
    4,705/7,057.91 = 1,242.25/x
  3. Step 3: Cross multiply
    4,705x = 7,057.91 × 1,242.25
  4. Step 4: Simplify right side
    4,705x = 8,767,688.70
  5. Step 5: Solve for x
    x = 8,767,688.70/4,705
  6. Step 6: Final answer
    x = 1,863.48

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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.