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Finding the Fourth Proportional to 717.56, 1,075.50 and 425.24

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Solution

The fourth proportional to 717.56, 1,075.50 and 425.24 is: 637.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.56 : 1,075.50 = 425.24 : x
  2. Step 2: Convert to fraction form
    717.56/1,075.50 = 425.24/x
  3. Step 3: Cross multiply
    717.56x = 1,075.50 × 425.24
  4. Step 4: Simplify right side
    717.56x = 457,345.62
  5. Step 5: Solve for x
    x = 457,345.62/717.56
  6. Step 6: Final answer
    x = 637.36

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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.