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Finding the Fourth Proportional to 3,472.48, 5,208.16 and 1,420

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Solution

The fourth proportional to 3,472.48, 5,208.16 and 1,420 is: 2,129.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,472.48 : 5,208.16 = 1,420 : x
  2. Step 2: Convert to fraction form
    3,472.48/5,208.16 = 1,420/x
  3. Step 3: Cross multiply
    3,472.48x = 5,208.16 × 1,420
  4. Step 4: Simplify right side
    3,472.48x = 7,395,587.20
  5. Step 5: Solve for x
    x = 7,395,587.20/3,472.48
  6. Step 6: Final answer
    x = 2,129.77

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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.