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Finding the Fourth Proportional to 717.02, 1,075.78 and 486.84

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Solution

The fourth proportional to 717.02, 1,075.78 and 486.84 is: 730.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.02 : 1,075.78 = 486.84 : x
  2. Step 2: Convert to fraction form
    717.02/1,075.78 = 486.84/x
  3. Step 3: Cross multiply
    717.02x = 1,075.78 × 486.84
  4. Step 4: Simplify right side
    717.02x = 523,732.74
  5. Step 5: Solve for x
    x = 523,732.74/717.02
  6. Step 6: Final answer
    x = 730.43

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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.