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Finding the Fourth Proportional to 4,985.24, 7,473.90 and 3,421.40

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Solution

The fourth proportional to 4,985.24, 7,473.90 and 3,421.40 is: 5,129.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.24 : 7,473.90 = 3,421.40 : x
  2. Step 2: Convert to fraction form
    4,985.24/7,473.90 = 3,421.40/x
  3. Step 3: Cross multiply
    4,985.24x = 7,473.90 × 3,421.40
  4. Step 4: Simplify right side
    4,985.24x = 25,571,201.46
  5. Step 5: Solve for x
    x = 25,571,201.46/4,985.24
  6. Step 6: Final answer
    x = 5,129.38

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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.