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Finding the Fourth Proportional to 1,170.02, 1,752.98 and 986.11

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Solution

The fourth proportional to 1,170.02, 1,752.98 and 986.11 is: 1,477.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.02 : 1,752.98 = 986.11 : x
  2. Step 2: Convert to fraction form
    1,170.02/1,752.98 = 986.11/x
  3. Step 3: Cross multiply
    1,170.02x = 1,752.98 × 986.11
  4. Step 4: Simplify right side
    1,170.02x = 1,728,621.79
  5. Step 5: Solve for x
    x = 1,728,621.79/1,170.02
  6. Step 6: Final answer
    x = 1,477.43

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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.