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Finding the Fourth Proportional to 2,717.25, 4,075.88 and 985.88

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Solution

The fourth proportional to 2,717.25, 4,075.88 and 985.88 is: 1,478.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,717.25 : 4,075.88 = 985.88 : x
  2. Step 2: Convert to fraction form
    2,717.25/4,075.88 = 985.88/x
  3. Step 3: Cross multiply
    2,717.25x = 4,075.88 × 985.88
  4. Step 4: Simplify right side
    2,717.25x = 4,018,328.57
  5. Step 5: Solve for x
    x = 4,018,328.57/2,717.25
  6. Step 6: Final answer
    x = 1,478.82

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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.