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Finding the Fourth Proportional to 717.04, 1,075.28 and 485.12

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Solution

The fourth proportional to 717.04, 1,075.28 and 485.12 is: 727.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.04 : 1,075.28 = 485.12 : x
  2. Step 2: Convert to fraction form
    717.04/1,075.28 = 485.12/x
  3. Step 3: Cross multiply
    717.04x = 1,075.28 × 485.12
  4. Step 4: Simplify right side
    717.04x = 521,639.83
  5. Step 5: Solve for x
    x = 521,639.83/717.04
  6. Step 6: Final answer
    x = 727.49

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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.