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Finding the Fourth Proportional to 757.45, 1,045.27 and 425.98

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Solution

The fourth proportional to 757.45, 1,045.27 and 425.98 is: 587.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.45 : 1,045.27 = 425.98 : x
  2. Step 2: Convert to fraction form
    757.45/1,045.27 = 425.98/x
  3. Step 3: Cross multiply
    757.45x = 1,045.27 × 425.98
  4. Step 4: Simplify right side
    757.45x = 445,264.11
  5. Step 5: Solve for x
    x = 445,264.11/757.45
  6. Step 6: Final answer
    x = 587.85

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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.