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Finding the Fourth Proportional to 1,267.84, 1,750.42 and 972.54

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Solution

The fourth proportional to 1,267.84, 1,750.42 and 972.54 is: 1,342.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.84 : 1,750.42 = 972.54 : x
  2. Step 2: Convert to fraction form
    1,267.84/1,750.42 = 972.54/x
  3. Step 3: Cross multiply
    1,267.84x = 1,750.42 × 972.54
  4. Step 4: Simplify right side
    1,267.84x = 1,702,353.47
  5. Step 5: Solve for x
    x = 1,702,353.47/1,267.84
  6. Step 6: Final answer
    x = 1,342.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.