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Finding the Fourth Proportional to 1,460, 2,190.10 and 486.20

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Solution

The fourth proportional to 1,460, 2,190.10 and 486.20 is: 729.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460 : 2,190.10 = 486.20 : x
  2. Step 2: Convert to fraction form
    1,460/2,190.10 = 486.20/x
  3. Step 3: Cross multiply
    1,460x = 2,190.10 × 486.20
  4. Step 4: Simplify right side
    1,460x = 1,064,826.62
  5. Step 5: Solve for x
    x = 1,064,826.62/1,460
  6. Step 6: Final answer
    x = 729.33

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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.