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Finding the Fourth Proportional to 717.82, 1,075.79 and 624.88

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Solution

The fourth proportional to 717.82, 1,075.79 and 624.88 is: 936.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.82 : 1,075.79 = 624.88 : x
  2. Step 2: Convert to fraction form
    717.82/1,075.79 = 624.88/x
  3. Step 3: Cross multiply
    717.82x = 1,075.79 × 624.88
  4. Step 4: Simplify right side
    717.82x = 672,239.66
  5. Step 5: Solve for x
    x = 672,239.66/717.82
  6. Step 6: Final answer
    x = 936.50

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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.