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Finding the Fourth Proportional to 1,140.95, 1,710.14 and 447.28

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Solution

The fourth proportional to 1,140.95, 1,710.14 and 447.28 is: 670.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.95 : 1,710.14 = 447.28 : x
  2. Step 2: Convert to fraction form
    1,140.95/1,710.14 = 447.28/x
  3. Step 3: Cross multiply
    1,140.95x = 1,710.14 × 447.28
  4. Step 4: Simplify right side
    1,140.95x = 764,904.91
  5. Step 5: Solve for x
    x = 764,904.91/1,140.95
  6. Step 6: Final answer
    x = 670.41

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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.