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Finding the Fourth Proportional to 1,656.20, 2,484.63 and 486.23

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Solution

The fourth proportional to 1,656.20, 2,484.63 and 486.23 is: 729.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.20 : 2,484.63 = 486.23 : x
  2. Step 2: Convert to fraction form
    1,656.20/2,484.63 = 486.23/x
  3. Step 3: Cross multiply
    1,656.20x = 2,484.63 × 486.23
  4. Step 4: Simplify right side
    1,656.20x = 1,208,089.22
  5. Step 5: Solve for x
    x = 1,208,089.22/1,656.20
  6. Step 6: Final answer
    x = 729.44

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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.