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Finding the Fourth Proportional to 1,140.61, 1,710.16 and 447.36

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Solution

The fourth proportional to 1,140.61, 1,710.16 and 447.36 is: 670.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.61 : 1,710.16 = 447.36 : x
  2. Step 2: Convert to fraction form
    1,140.61/1,710.16 = 447.36/x
  3. Step 3: Cross multiply
    1,140.61x = 1,710.16 × 447.36
  4. Step 4: Simplify right side
    1,140.61x = 765,057.18
  5. Step 5: Solve for x
    x = 765,057.18/1,140.61
  6. Step 6: Final answer
    x = 670.74

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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.