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Finding the Fourth Proportional to 1,492.66, 2,058.44 and 988.28

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Solution

The fourth proportional to 1,492.66, 2,058.44 and 988.28 is: 1,362.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.66 : 2,058.44 = 988.28 : x
  2. Step 2: Convert to fraction form
    1,492.66/2,058.44 = 988.28/x
  3. Step 3: Cross multiply
    1,492.66x = 2,058.44 × 988.28
  4. Step 4: Simplify right side
    1,492.66x = 2,034,324.71
  5. Step 5: Solve for x
    x = 2,034,324.71/1,492.66
  6. Step 6: Final answer
    x = 1,362.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.