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Finding the Fourth Proportional to 4,707.56, 7,062 and 1,420.28

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Solution

The fourth proportional to 4,707.56, 7,062 and 1,420.28 is: 2,130.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,707.56 : 7,062 = 1,420.28 : x
  2. Step 2: Convert to fraction form
    4,707.56/7,062 = 1,420.28/x
  3. Step 3: Cross multiply
    4,707.56x = 7,062 × 1,420.28
  4. Step 4: Simplify right side
    4,707.56x = 10,030,017.36
  5. Step 5: Solve for x
    x = 10,030,017.36/4,707.56
  6. Step 6: Final answer
    x = 2,130.62

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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.