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Finding the Fourth Proportional to 759.77, 1,048.31 and 445.06

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Solution

The fourth proportional to 759.77, 1,048.31 and 445.06 is: 614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.77 : 1,048.31 = 445.06 : x
  2. Step 2: Convert to fraction form
    759.77/1,048.31 = 445.06/x
  3. Step 3: Cross multiply
    759.77x = 1,048.31 × 445.06
  4. Step 4: Simplify right side
    759.77x = 466,555.61
  5. Step 5: Solve for x
    x = 466,555.61/759.77
  6. Step 6: Final answer
    x = 614.08

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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.