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Finding the Fourth Proportional to 3,437.34, 5,156.20 and 972.34

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Solution

The fourth proportional to 3,437.34, 5,156.20 and 972.34 is: 1,458.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,437.34 : 5,156.20 = 972.34 : x
  2. Step 2: Convert to fraction form
    3,437.34/5,156.20 = 972.34/x
  3. Step 3: Cross multiply
    3,437.34x = 5,156.20 × 972.34
  4. Step 4: Simplify right side
    3,437.34x = 5,013,579.51
  5. Step 5: Solve for x
    x = 5,013,579.51/3,437.34
  6. Step 6: Final answer
    x = 1,458.56

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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.