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Finding the Fourth Proportional to 717.72, 1,075.73 and 607.69

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Solution

The fourth proportional to 717.72, 1,075.73 and 607.69 is: 910.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.72 : 1,075.73 = 607.69 : x
  2. Step 2: Convert to fraction form
    717.72/1,075.73 = 607.69/x
  3. Step 3: Cross multiply
    717.72x = 1,075.73 × 607.69
  4. Step 4: Simplify right side
    717.72x = 653,710.58
  5. Step 5: Solve for x
    x = 653,710.58/717.72
  6. Step 6: Final answer
    x = 910.81

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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.