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Finding the Fourth Proportional to 717.46, 1,075.20 and 425.02

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Solution

The fourth proportional to 717.46, 1,075.20 and 425.02 is: 636.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.46 : 1,075.20 = 425.02 : x
  2. Step 2: Convert to fraction form
    717.46/1,075.20 = 425.02/x
  3. Step 3: Cross multiply
    717.46x = 1,075.20 × 425.02
  4. Step 4: Simplify right side
    717.46x = 456,981.50
  5. Step 5: Solve for x
    x = 456,981.50/717.46
  6. Step 6: Final answer
    x = 636.94

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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.