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Finding the Fourth Proportional to 717.16, 1,075.90 and 284.36

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Solution

The fourth proportional to 717.16, 1,075.90 and 284.36 is: 426.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.16 : 1,075.90 = 284.36 : x
  2. Step 2: Convert to fraction form
    717.16/1,075.90 = 284.36/x
  3. Step 3: Cross multiply
    717.16x = 1,075.90 × 284.36
  4. Step 4: Simplify right side
    717.16x = 305,942.92
  5. Step 5: Solve for x
    x = 305,942.92/717.16
  6. Step 6: Final answer
    x = 426.60

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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.